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Organovo Holdings, Inc. – ‘10-KT’ for 3/31/13 – ‘EX-101.LAB’

On:  Friday, 5/24/13, at 4:02pm ET   ·   For:  3/31/13   ·   Accession #:  1193125-13-235652   ·   File #:  0-54621

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 5/24/13  Organovo Holdings, Inc.           10-KT       3/31/13   66:7.4M                                   Donnelley … Solutions/FA

Annual-Transition Report   —   Form 10-K   —   Rule 13a-10 / 15d-10
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-KT       Annual-Transition Report                            HTML    783K 
 2: EX-23.1     Consent of Experts or Counsel                       HTML     18K 
 3: EX-31.1     Certification -- §302 - SOA'02                      HTML     23K 
 4: EX-31.2     Certification -- §302 - SOA'02                      HTML     23K 
 5: EX-32.1     Certification -- §906 - SOA'02                      HTML     22K 
43: R1          Document and Entity Information                     HTML     48K 
33: R2          Consolidated Balance Sheets                         HTML    129K 
41: R3          Consolidated Balance Sheets (Parenthetical)         HTML     33K 
46: R4          Consolidated Statements of Operations               HTML     83K 
61: R5          Consolidated Statements of Stockholders' Equity     HTML    134K 
                (Deficit)                                                        
35: R6          Consolidated Statements of Cash Flows               HTML    156K 
40: R7          Consolidated Statements of Cash Flows               HTML     47K 
                (Parenthetical)                                                  
30: R8          Change in Fiscal Year End                           HTML     22K 
22: R9          Description of Business and Summary of Significant  HTML     96K 
                Accounting Policies                                              
62: R10         Fixed Assets                                        HTML     37K 
48: R11         Accrued Expenses                                    HTML     29K 
47: R12         Derivative Liability                                HTML     49K 
52: R13         Convertible Notes Payable                           HTML     39K 
53: R14         Stockholders' Equity                                HTML    112K 
51: R15         Commitments and Contingencies                       HTML     44K 
54: R16         Licensing Agreements and Research Contracts         HTML     37K 
42: R17         Income Taxes                                        HTML     43K 
45: R18         Concentrations                                      HTML     26K 
50: R19         Subsequent Events                                   HTML     22K 
66: R20         Description of Business and Summary of Significant  HTML    191K 
                Accounting Policies (Policies)                                   
57: R21         Description of Business and Summary of Significant  HTML     49K 
                Accounting Policies (Tables)                                     
37: R22         Fixed Assets (Tables)                               HTML     35K 
49: R23         Accrued Expenses (Tables)                           HTML     28K 
39: R24         Derivative Liability (Tables)                       HTML     34K 
16: R25         Stockholders' Equity (Tables)                       HTML     91K 
58: R26         Commitments and Contingencies (Tables)              HTML     40K 
63: R27         Licensing Agreements and Research Contracts         HTML     28K 
                (Tables)                                                         
26: R28         Income Taxes (Tables)                               HTML     35K 
25: R29         Description of Business and Summary of Significant  HTML     32K 
                Accounting Policies (Details)                                    
28: R30         Description of Business and Summary of Significant  HTML     38K 
                Accounting Policies (Details 1)                                  
29: R31         Description of Business and Summary of Significant  HTML    283K 
                Accounting Policies (Details Textual)                            
31: R32         Fixed Assets (Details)                              HTML     41K 
15: R33         Fixed Assets (Details Textual)                      HTML     23K 
55: R34         Accrued Expenses (Details)                          HTML     34K 
36: R35         Derivative Liability (Details)                      HTML     34K 
38: R36         Derivative Liability (Details Textual)              HTML     39K 
19: R37         Convertible Notes Payable (Details)                 HTML    230K 
65: R38         Stockholders' Equity (Details)                      HTML     34K 
12: R39         Stockholders' Equity (Details 1)                    HTML     59K 
32: R40         Stockholders' Equity (Details 2)                    HTML     36K 
60: R41         Stockholders' Equity (Details 3)                    HTML     49K 
18: R42         Stockholders' Equity (Details 4)                    HTML     24K 
24: R43         Stockholders' Equity (Details Textual)              HTML    375K 
27: R44         Commitments and Contingencies (Details)             HTML     33K 
34: R45         Commitments and Contingencies (Details 1)           HTML     28K 
14: R46         Commitments and Contingencies (Details 2)           HTML     46K 
21: R47         Commitments and Contingencies (Details Textual)     HTML     34K 
13: R48         Licensing Agreements and Research Contracts         HTML     28K 
                (Details)                                                        
59: R49         Licensing Agreements and Research Contracts         HTML     83K 
                (Details Textual)                                                
17: R50         Income Taxes (Details)                              HTML     51K 
56: R51         Income Taxes (Details Textual)                      HTML     48K 
20: R52         Subsequent Events (Details Textual)                 HTML     29K 
64: XML         IDEA XML File -- Filing Summary                      XML    102K 
23: EXCEL       IDEA Workbook of Financial Reports (.xls)            XLS   1.16M 
 6: EX-101.INS  XBRL Instance -- onvo-20130331                       XML   1.38M 
 8: EX-101.CAL  XBRL Calculations -- onvo-20130331_cal               XML    193K 
 9: EX-101.DEF  XBRL Definitions -- onvo-20130331_def                XML    623K 
10: EX-101.LAB  XBRL Labels -- onvo-20130331_lab                     XML   1.38M 
11: EX-101.PRE  XBRL Presentations -- onvo-20130331_pre              XML    981K 
 7: EX-101.SCH  XBRL Schema -- onvo-20130331                         XSD    201K 
44: ZIP         XBRL Zipped Folder -- 0001193125-13-235652-xbrl      Zip    160K 


‘EX-101.LAB’   —   XBRL Labels — onvo-20130331_lab


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
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<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2008-03-31.xsd#negated" roleURI="http://xbrl.us/us-gaap/role/label/negated"/>
<roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" roleURI="http://www.xbrl.org/2009/role/negatedLabel"/>
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<labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
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<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DocumentAndEntityInformationAbstract" xlink:to="onvo_DocumentAndEntityInformationAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US"> Document and Entity Information [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US"> Document and entity information. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US"> Document Type </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US"> Amendment Flag </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US"> Document Period End Date </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US"> Document Fiscal Period Focus </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US"> Document Fiscal Year Focus </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US"> Entity Registrant Name </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US"> Entity Central Index Key </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US"> Current Fiscal Year End Date </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US"> Entity Filer Category </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xml:lang="en-US"> Entity Common Stock, Shares Outstanding </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US"> Consolidated Balance Sheets [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US"> Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US"> Assets [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash and cash equivalents </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash and Cash Equivalents at Beginning of Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash and Cash Equivalents at End of Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash and Cash Equivalents, At Carrying Value </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US"> Inventory </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US"> Inventory, Net </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredFinanceCostsCurrentNet" xlink:label="us-gaap_DeferredFinanceCostsCurrentNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsCurrentNet" xlink:to="us-gaap_DeferredFinanceCostsCurrentNet_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredFinanceCostsCurrentNet_lbl" xml:lang="en-US"> Deferred financing costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredFinanceCostsCurrentNet_lbl" xml:lang="en-US"> Deferred Finance Costs, Current, Net </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US"> Prepaid expenses and other current assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US"> Prepaid Expense and Other Assets, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US"> Total current assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US"> Assets, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US"> Fixed Assets - Net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US"> Net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US"> Assets, Noncurrent </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndInvestments" xlink:label="us-gaap_RestrictedCashAndInvestments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndInvestments" xlink:to="us-gaap_RestrictedCashAndInvestments_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RestrictedCashAndInvestments_lbl" xml:lang="en-US"> Restricted Cash </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashAndInvestments_lbl" xml:lang="en-US"> Restricted Cash and Investments </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US"> Other Assets - Net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US"> Other Assets, Noncurrent </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US"> Total assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US"> Assets </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US"> Liabilities and Stockholders' Equity (Deficit) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US"> Liabilities and Equity [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xml:lang="en-US"> Accounts payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xml:lang="en-US"> Accounts Payable, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Accrued expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Total Other Income (Expense) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Accrued Liabilities, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="us-gaap_DeferredRevenueCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueCurrent" xlink:to="us-gaap_DeferredRevenueCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US"> Deferred revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US"> Deferred revenue related to its collaborative research programs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US"> Deferred Revenue, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xml:lang="en-US"> Accrued interest payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xml:lang="en-US"> Interest Payable </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConvertibleNotesPayableCurrent" xlink:label="us-gaap_ConvertibleNotesPayableCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleNotesPayableCurrent" xlink:to="us-gaap_ConvertibleNotesPayableCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xml:lang="en-US"> Convertible notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xml:lang="en-US"> Convertible Notes Payable, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US"> Total current liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US"> Liabilities, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US"> Total liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US"> Liabilities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US"> Commitments and Contingencies (see Note 8) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US"> Commitments and Contingencies </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US"> Stockholders' Equity (Deficit) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US"> Stockholders Equity, Including Portion Attributable To Noncontrolling Interest [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US"> Common stock, $0.001 par value; 150,000,000 shares authorized, 64,686,919, 58,535,411 and 22,445,254 shares issued and outstanding at March 31, 2013, December 31, 2012 and December 31, 2011, respectively </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US"> Common Stock, Value, Issued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US"> Additional paid-in capital </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US"> Additional Paid In Capital </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage" xlink:label="us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage" xlink:to="us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage_lbl" xml:lang="en-US"> Deficit accumulated during the development stage </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage_lbl" xml:lang="en-US"> Development Stage Enterprise, Deficit Accumulated During Development Stage </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Total stockholders' equity (deficit) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Accumulated deficit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Beginning balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Ending balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Stockholders Equity, Including Portion Attributable To Noncontrolling Interest </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US"> Total Liabilities and Stockholders' Equity (Deficit) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US"> Liabilities and Equity </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Common stock, par value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Common Stock, Par or Stated Value Per Share </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US"> Common stock, shares authorized </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US"> Common Stock, Shares Authorized </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US"> Common stock, shares issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US"> Common stock, shares issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US"> Common Stock, Shares, Issued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US"> Common stock, shares outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US"> Common Stock, Shares, Outstanding </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US"> Consolidated Statements of Operations [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US"> Revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US"> Revenues [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="us-gaap_SalesRevenueGoodsNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesRevenueGoodsNet" xlink:to="us-gaap_SalesRevenueGoodsNet_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US"> Product </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US"> Sales Revenue, Goods, Net </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RevenueFromCollaborations" xlink:label="onvo_RevenueFromCollaborations"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RevenueFromCollaborations" xlink:to="onvo_RevenueFromCollaborations_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RevenueFromCollaborations_lbl" xml:lang="en-US"> Collaborations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RevenueFromCollaborations_lbl" xml:lang="en-US"> Revenue from Collaborations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RevenueFromCollaborations_lbl" xml:lang="en-US"> Revenue from collaborations. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueFromGrants" xlink:label="us-gaap_RevenueFromGrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromGrants" xlink:to="us-gaap_RevenueFromGrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenueFromGrants_lbl" xml:lang="en-US"> Grants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromGrants_lbl" xml:lang="en-US"> Revenue from Grants </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US"> Total Revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US"> Total revenue recognized from inception on the contract </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US"> Revenues </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="us-gaap_CostOfGoodsSold"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsSold" xlink:to="us-gaap_CostOfGoodsSold_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CostOfGoodsSold_lbl" xml:lang="en-US"> Cost of product revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsSold_lbl" xml:lang="en-US"> Cost of Goods Sold </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> Selling, general, and administrative expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> General and administrative expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> Selling, General and Administrative Expense </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xml:lang="en-US"> Research and development expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xml:lang="en-US"> Research and Development Expense </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US"> Loss from Operations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US"> Operating Income (Loss) </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_NonoperatingIncomeExpenseAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US"> Other Income (Expense) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US"> Nonoperating Income (Expense) [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US"> Interest Expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US"> Interest expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US"> Interest Expense </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US"> Interest income </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US"> Investment Income, Interest </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="us-gaap_OtherNonoperatingExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingExpense" xlink:to="us-gaap_OtherNonoperatingExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherNonoperatingExpense_lbl" xml:lang="en-US"> Other expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingExpense_lbl" xml:lang="en-US"> Other Nonoperating Expense </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US"> Total Other Income (Expense) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US"> Nonoperating Income (Expense) </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US"> Net Loss </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US"> Net Loss </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US"> Net loss </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US"> Net Income (Loss), Including Portion Attributable To Noncontrolling Interest </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US"> Consolidated Statements of Stockholders' Equity (Deficit) [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US"> Statement [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US"> Statement, Equity Components [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US"> Common Stock [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US"> Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US"> Common Stock [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US"> Additional Paid-in Capital </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US"> Additional Paid In Capital [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US"> Deficit Accumulated During the Development Stage </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US"> Retained Earnings [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US"> Equity Component [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US"> Statement [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharesOutstanding_lbl" xml:lang="en-US"> Beginning balance, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharesOutstanding_lbl" xml:lang="en-US"> Ending balance, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesOutstanding_lbl" xml:lang="en-US"> Shares, Outstanding </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xml:lang="en-US"> Issuance of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xml:lang="en-US"> Stock Issued During Period, Shares, New Issues </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation" xlink:label="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation" xlink:to="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation_lbl" xml:lang="en-US"> Issuance of common stock to founders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation_lbl" xml:lang="en-US"> Stock Granted During Period, Value, Share-Based Compensation, Net Of Forfeitures </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US"> Issuance of common stock to founders, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US"> Stock Issued During Period, Shares, Share-Based Compensation, Net Of Forfeitures </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_lbl" xml:lang="en-US"> Issuance of restricted common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_lbl" xml:lang="en-US"> Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_lbl" xml:lang="en-US"> Issuance of restricted common stock, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_lbl" xml:lang="en-US"> Stock Issued During Period Shares Restricted Stock Award Net of Forfeitures </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xml:lang="en-US"> Stock Issued During Period, Value, Conversion of Convertible Securities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xml:lang="en-US"> Common stock issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xml:lang="en-US"> Stock Issued During Period, Shares, Conversion of Convertible Securities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xml:lang="en-US"> Issuance of warrants to consultants/Warrants issued with convertible notes and conversion of notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Warrant Issued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:to="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl" xml:lang="en-US"> Issuance of notes, recorded discount for beneficial conversion feature </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl" xml:lang="en-US"> Beneficial conversion feature of convertible notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_lbl" xml:lang="en-US"> Debt Instrument, Convertible, Beneficial Conversion Feature </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US"> Stock-based compensation expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US"> Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US"> Consolidated Statements of Cash Flows [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Cash Flows From Operating Activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Operating Activities [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Adjustments to reconcile net loss to net cash used in operating activities: </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Adjustments To Reconcile Net Income (Loss) To Cash Provided By (Used In) Operating Activities [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US"> Amortization of deferred financing costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US"> Amortization of Financing Costs </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US"> Depreciation and amortization </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US"> Depreciation, Depletion and Amortization </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xml:lang="en-US"> Amortization of debt discount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xml:lang="en-US"> Amortization of Debt Discount (Premium) </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xml:lang="en-US"> Change in fair value of warrant liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xml:lang="en-US"> Unrealized Gain (Loss) on Derivatives </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US"> Stock-based compensation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US"> Share-based Compensation </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:label="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:to="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_lbl" xml:lang="en-US"> Warrants issued in connection with exchange agreement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_lbl" xml:lang="en-US"> Issuance Of Stock and Warrants For Services Or Claims </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US"> Increase (decrease) in cash resulting from changes in: </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US"> Increase (Decrease) In Operating Capital [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IncreaseDecreaseInGrantsReceivable" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseDecreaseInGrantsReceivable" xlink:to="onvo_IncreaseDecreaseInGrantsReceivable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xml:lang="en-US"> Grants receivable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xml:lang="en-US"> Increase Decrease in Grants Receivable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xml:lang="en-US"> Increase decrease in grants receivable. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xml:lang="en-US"> Inventory </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xml:lang="en-US"> Increase (Decrease) in Inventories </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xml:lang="en-US"> Prepaid expenses and other current assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xml:lang="en-US"> Increase (Decrease) in Prepaid Expense and Other Assets </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US"> Accounts payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US"> Increase (Decrease) in Accounts Payable </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US"> Accrued expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US"> Increase (Decrease) in Accrued Liabilities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xml:lang="en-US"> Deferred revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xml:lang="en-US"> Increase (Decrease) In Deferred Revenue </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US"> Cash flow from operations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US"> Net cash used in operating activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Operating Activities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US"> Cash Flows From Investing Activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Investing Activities [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US"> Purchases of fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US"> Payments to Acquire Property, Plant, and Equipment </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireIntangibleAssets" xlink:to="us-gaap_PaymentsToAcquireIntangibleAssets_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xml:lang="en-US"> Purchases of intangible assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xml:lang="en-US"> Payments To Acquire Intangible Assets </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US"> Net cash used in investing activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Investing Activities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US"> Cash Flows From Financing Activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Financing Activities [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromNotesPayable" xlink:label="us-gaap_ProceedsFromNotesPayable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromNotesPayable" xlink:to="us-gaap_ProceedsFromNotesPayable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xml:lang="en-US"> Proceeds from issuance of convertible notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xml:lang="en-US"> Funds raised through loans consisting of Convertible notes </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xml:lang="en-US"> Proceeds from Notes Payable </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRelatedPartyDebt" xlink:to="us-gaap_ProceedsFromRelatedPartyDebt_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xml:lang="en-US"> Proceeds from issuance of related party notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xml:lang="en-US"> Proceeds from Related Party Debt </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfRelatedPartyDebt" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfRelatedPartyDebt" xlink:to="us-gaap_RepaymentsOfRelatedPartyDebt_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xml:lang="en-US"> Repayment of related party notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xml:lang="en-US"> Repayments of Related Party Debt </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="us-gaap_PaymentsOfFinancingCosts"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfFinancingCosts" xlink:to="us-gaap_PaymentsOfFinancingCosts_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xml:lang="en-US"> Deferred financing costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xml:lang="en-US"> Payments of Financing Costs </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US"> Net cash provided by financing activities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US"> Net Cash Provided By (Used In) Financing Activities </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US"> Net Increase in Cash and Cash Equivalents </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US"> Cash and Cash Equivalents, Period Increase (Decrease) </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US"> Supplemental Disclosures of Cash Flow Information: </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US"> Supplemental Cash Flow Information [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaid" xlink:label="us-gaap_InterestPaid"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaid" xlink:to="us-gaap_InterestPaid_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US"> Interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US"> Interest Paid </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="us-gaap_IncomeTaxesPaid"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaid" xlink:to="us-gaap_IncomeTaxesPaid_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xml:lang="en-US"> Income Taxes </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xml:lang="en-US"> Income Taxes Paid </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantsAndRelatedBeneficialConversionFeatureValue" xlink:label="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue" xlink:to="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue_lbl" xml:lang="en-US"> Warrants and related beneficial conversion feature valued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue_lbl" xml:lang="en-US"> Warrants and Related Beneficial Conversion Feature Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantsAndRelatedBeneficialConversionFeatureValue_lbl" xml:lang="en-US"> Warrants and related beneficial conversion feature, value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue" xlink:label="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue" xlink:to="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue_lbl" xml:lang="en-US"> Warrants issued in connection with convertible notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue_lbl" xml:lang="en-US"> Warrant Issued in Connection with Convertible Notes Payable Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantIssuedInConnectionWithConvertibleNotesPayableValue_lbl" xml:lang="en-US"> Warrant issued in connection with convertible notes payable, value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockToNoteHoldersShares" xlink:label="onvo_IssuanceOfCommonStockToNoteHoldersShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockToNoteHoldersShares" xlink:to="onvo_IssuanceOfCommonStockToNoteHoldersShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockToNoteHoldersShares_lbl" xml:lang="en-US"> Issuance of common stock to note holders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockToNoteHoldersShares_lbl" xml:lang="en-US"> Issuance of Common Stock to Note Holders Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockToNoteHoldersShares_lbl" xml:lang="en-US"> Issuance of common stock to note holders, shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConvertibleNotesPrincipalAmount" xlink:label="onvo_ConvertibleNotesPrincipalAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConvertibleNotesPrincipalAmount" xlink:to="onvo_ConvertibleNotesPrincipalAmount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConvertibleNotesPrincipalAmount_lbl" xml:lang="en-US"> Convertible Notes principal balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConvertibleNotesPrincipalAmount_lbl" xml:lang="en-US"> Convertible Notes Principal Amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConvertibleNotesPrincipalAmount_lbl" xml:lang="en-US"> Convertible notes principal amount. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AccruedInterestOnConvertibleNotes" xlink:label="onvo_AccruedInterestOnConvertibleNotes"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AccruedInterestOnConvertibleNotes" xlink:to="onvo_AccruedInterestOnConvertibleNotes_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AccruedInterestOnConvertibleNotes_lbl" xml:lang="en-US"> Accrued interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="onvo_AccruedInterestOnConvertibleNotes_lbl" xml:lang="en-US"> Accrued interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AccruedInterestOnConvertibleNotes_lbl" xml:lang="en-US"> Accrued Interest on Convertible Notes </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AccruedInterestOnConvertibleNotes_lbl" xml:lang="en-US"> Accrued interest on convertible notes. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US"> Change in Fiscal Year End [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xml:lang="en-US"> Derivative Liability </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xml:lang="en-US"> Derivative Instruments and Hedging Activities Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US"> Convertible Notes Payable [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US"> Stockholders' Equity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US"> Stockholders Equity Note Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US"> Commitments and Contingencies [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RisksAndUncertaintiesAbstract" xlink:label="us-gaap_RisksAndUncertaintiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RisksAndUncertaintiesAbstract" xlink:to="us-gaap_RisksAndUncertaintiesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RisksAndUncertaintiesAbstract_lbl" xml:lang="en-US"> Concentrations [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConcentrationRiskDisclosureTextBlock" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskDisclosureTextBlock" xlink:to="us-gaap_ConcentrationRiskDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock_lbl" xml:lang="en-US"> Concentrations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock_lbl" xml:lang="en-US"> Concentration Risk Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock" xlink:label="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock" xlink:to="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock_lbl" xml:lang="en-US"> Nature of operations and basis of presentation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock_lbl" xml:lang="en-US"> Nature of Operations and Basis of Presentation [Policy Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NatureOfOperationsAndBasisOfPresentationPolicyTextBlock_lbl" xml:lang="en-US"> Nature of operations and basis of presentation. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DeferredFinancingCostsPolicyTextBlock" xlink:label="onvo_DeferredFinancingCostsPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DeferredFinancingCostsPolicyTextBlock" xlink:to="onvo_DeferredFinancingCostsPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DeferredFinancingCostsPolicyTextBlock_lbl" xml:lang="en-US"> Deferred financing costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DeferredFinancingCostsPolicyTextBlock_lbl" xml:lang="en-US"> Deferred Financing Costs [Policy Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DeferredFinancingCostsPolicyTextBlock_lbl" xml:lang="en-US"> Deferred financing costs. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiquidityDisclosureTextBlock" xlink:label="us-gaap_LiquidityDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiquidityDisclosureTextBlock" xlink:to="lab_LiquidityDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_LiquidityDisclosureTextBlock" xml:lang="en-US"> Liquidity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LiquidityDisclosureTextBlock" xml:lang="en-US"> Liquidity Disclosure [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="lab_UseOfEstimates"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_UseOfEstimates" xml:lang="en-US"> Use of estimates </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_UseOfEstimates" xml:lang="en-US"> Use of Estimates, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="lab_CashAndCashEquivalentsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US"> Cash and cash equivalents </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US"> Cash and Cash Equivalents, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:to="lab_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xml:lang="en-US"> Restricted cash </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xml:lang="en-US"> Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="us-gaap_InventoryPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryPolicyTextBlock" xlink:to="lab_InventoryPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_InventoryPolicyTextBlock" xml:lang="en-US"> Inventory </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_InventoryPolicyTextBlock" xml:lang="en-US"> Inventory, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:to="lab_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xml:lang="en-US"> Impairment of long-lived assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xml:lang="en-US"> Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:to="lab_FairValueMeasurementPolicyPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueMeasurementPolicyPolicyTextBlock" xml:lang="en-US"> Fair value measurement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueMeasurementPolicyPolicyTextBlock" xml:lang="en-US"> Fair Value Measurement, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionPolicyTextBlock" xlink:to="lab_RevenueRecognitionPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RevenueRecognitionPolicyTextBlock" xml:lang="en-US"> Revenue recognition </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RevenueRecognitionPolicyTextBlock" xml:lang="en-US"> Revenue Recognition, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="lab_EarningsPerSharePolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EarningsPerSharePolicyTextBlock" xml:lang="en-US"> Net loss per share </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EarningsPerSharePolicyTextBlock" xml:lang="en-US"> Earnings Per Share, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xml:lang="en-US"> Activity for liabilities measured at estimated fair value using unobservable inputs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xml:lang="en-US"> Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="us-gaap_FairValueMeasurementsRecurringMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsRecurringMember" xlink:to="lab_FairValueMeasurementsRecurringMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueMeasurementsRecurringMember" xml:lang="en-US"> Fair Value, Measurements, Recurring [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueMeasurementsRecurringMember" xml:lang="en-US"> Fair Value, Measurements, Recurring [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:to="lab_LiabilitiesFairValueDisclosureAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_LiabilitiesFairValueDisclosureAbstract" xml:lang="en-US"> Estimated fair values of the liabilities measured on a recurring basis </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LiabilitiesFairValueDisclosureAbstract" xml:lang="en-US"> Liabilities, Fair Value Disclosure [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="lab_FairValueInputsLevel3Member"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueInputsLevel3Member" xml:lang="en-US"> Significant Other Unobservable Inputs (Level 3) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueInputsLevel3Member" xml:lang="en-US"> Fair Value, Inputs, Level 3 [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="lab_FairValueInputsLevel2Member"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueInputsLevel2Member" xml:lang="en-US"> Significant Other Observable Inputs (Level 2) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueInputsLevel2Member" xml:lang="en-US"> Fair Value, Inputs, Level 2 [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="lab_FairValueInputsLevel1Member"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueInputsLevel1Member" xml:lang="en-US"> Quoted Prices in Active Markets (Level 1) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueInputsLevel1Member" xml:lang="en-US"> Fair Value, Inputs, Level 1 [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember" xlink:label="us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember" xlink:to="lab_DerivativeFinancialInstrumentsLiabilitiesMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DerivativeFinancialInstrumentsLiabilitiesMember" xml:lang="en-US"> Warrant Derivative Liability [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativeFinancialInstrumentsLiabilitiesMember" xml:lang="en-US"> Derivative Financial Instruments, Liabilities [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xml:lang="en-US"> Activity for liabilities measured at estimated fair value using unobservable inputs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xml:lang="en-US"> Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues" xlink:to="lab_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues" xml:lang="en-US"> Issuances </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues" xml:lang="en-US"> Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issues </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="lab_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xml:lang="en-US"> Fair Value Measurements, Recurring and Nonrecurring [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="lab_FairValueByMeasurementFrequencyAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueByMeasurementFrequencyAxis" xml:lang="en-US"> Measurement Frequency [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="lab_FairValueMeasurementFrequencyDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueMeasurementFrequencyDomain" xml:lang="en-US"> Fair Value, Measurement Frequency [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_FairValueByFairValueHierarchyLevelAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueByFairValueHierarchyLevelAxis" xml:lang="en-US"> Fair Value, Hierarchy [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_FairValueMeasurementsFairValueHierarchyDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueMeasurementsFairValueHierarchyDomain" xml:lang="en-US"> Fair Value, Measurements, Fair Value Hierarchy [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="lab_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xml:lang="en-US"> Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xml:lang="en-US"> Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="us-gaap_FairValueByLiabilityClassAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByLiabilityClassAxis" xlink:to="lab_FairValueByLiabilityClassAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueByLiabilityClassAxis" xml:lang="en-US"> Liability Class [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xml:lang="en-US"> Fair Value by Liability Class [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xml:lang="en-US"> Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FormerSecurityHoldersCommonStockVotingInterest" xlink:label="onvo_FormerSecurityHoldersCommonStockVotingInterest"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FormerSecurityHoldersCommonStockVotingInterest" xlink:to="onvo_FormerSecurityHoldersCommonStockVotingInterest_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FormerSecurityHoldersCommonStockVotingInterest_lbl" xml:lang="en-US"> Former security holders common stock voting interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FormerSecurityHoldersCommonStockVotingInterest_lbl" xml:lang="en-US"> Former Security Holders Common Stock Voting Interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FormerSecurityHoldersCommonStockVotingInterest_lbl" xml:lang="en-US"> Former security holders common stock voting interest. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CompanysStockholdersRetainedVotingInterest" xlink:label="onvo_CompanysStockholdersRetainedVotingInterest"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CompanysStockholdersRetainedVotingInterest" xlink:to="onvo_CompanysStockholdersRetainedVotingInterest_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CompanysStockholdersRetainedVotingInterest_lbl" xml:lang="en-US"> Company's stockholders retained voting interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CompanysStockholdersRetainedVotingInterest_lbl" xml:lang="en-US"> Company's Stockholders Retained Voting Interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CompanysStockholdersRetainedVotingInterest_lbl" xml:lang="en-US"> Company's stockholders retained voting interest. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_MergerTransitionMember" xlink:label="onvo_MergerTransitionMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerTransitionMember" xlink:to="onvo_MergerTransitionMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_MergerTransitionMember_lbl" xml:lang="en-US"> Merger transition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_MergerTransitionMember_lbl" xml:lang="en-US"> Merger Transition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_MergerTransitionMember_lbl" xml:lang="en-US"> Merger transition. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="lab_BusinessAcquisitionAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_BusinessAcquisitionAxis" xml:lang="en-US"> Business Acquisition [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="lab_BusinessAcquisitionAcquireeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_BusinessAcquisitionAcquireeDomain" xml:lang="en-US"> Business Acquisition, Acquiree [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:to="lab_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RestrictedCashAndCashEquivalentsAtCarryingValue" xml:lang="en-US"> Restricted cash </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RestrictedCashAndCashEquivalentsAtCarryingValue" xml:lang="en-US"> Restricted Cash and Cash Equivalents, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoods" xlink:to="lab_InventoryFinishedGoods"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_InventoryFinishedGoods" xml:lang="en-US"> Inventory of finished goods </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_InventoryFinishedGoods" xml:lang="en-US"> Inventory, Finished Goods, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="us-gaap_InventoryRawMaterials"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterials" xlink:to="lab_InventoryRawMaterials"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_InventoryRawMaterials" xml:lang="en-US"> Inventory of raw materials </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_InventoryRawMaterials" xml:lang="en-US"> Inventory, Raw Materials, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConvertibleNotesPayableMember" xlink:label="us-gaap_ConvertibleNotesPayableMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleNotesPayableMember" xlink:to="lab_ConvertibleNotesPayableMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ConvertibleNotesPayableMember" xml:lang="en-US"> Convertible Notes Payable [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ConvertibleNotesPayableMember" xml:lang="en-US"> Convertible Notes Payable [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="lab_PlanNameAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PlanNameAxis" xml:lang="en-US"> Plan Name [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="lab_PlanNameDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PlanNameDomain" xml:lang="en-US"> Plan Name [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="us-gaap_ShortTermDebtTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="lab_ShortTermDebtTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShortTermDebtTypeAxis" xml:lang="en-US"> Short-term Debt, Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="us-gaap_ShortTermDebtTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="lab_ShortTermDebtTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShortTermDebtTypeDomain" xml:lang="en-US"> Short-term Debt, Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="us-gaap_RangeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeAxis" xlink:to="lab_RangeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RangeAxis" xml:lang="en-US"> Range [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="us-gaap_RangeMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeMember" xlink:to="lab_RangeMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RangeMember" xml:lang="en-US"> Range [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="lab_MaximumMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_MaximumMember" xml:lang="en-US"> Maximum [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_MaximumMember" xml:lang="en-US"> Maximum [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumMember" xlink:to="lab_MinimumMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_MinimumMember" xml:lang="en-US"> Minimum [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_MinimumMember" xml:lang="en-US"> Minimum [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:to="lab_ProceedsFromIssuanceOfPrivatePlacement"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ProceedsFromIssuanceOfPrivatePlacement" xml:lang="en-US"> Total gross proceeds of approximately </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ProceedsFromIssuanceOfPrivatePlacement" xml:lang="en-US"> Proceeds from Issuance of Private Placement </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:to="lab_EquityInterestIssuedOrIssuableByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EquityInterestIssuedOrIssuableByTypeAxis" xml:lang="en-US"> Equity Interest Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:to="lab_EquityInterestIssuedOrIssuableTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EquityInterestIssuedOrIssuableTypeDomain" xml:lang="en-US"> Equity Interest Issued or Issuable, Type [Domain] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ResearchContractAgreementWithThirdParty" xlink:label="onvo_ResearchContractAgreementWithThirdParty"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ResearchContractAgreementWithThirdParty" xlink:to="onvo_ResearchContractAgreementWithThirdParty_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ResearchContractAgreementWithThirdParty_lbl" xml:lang="en-US"> Term of research contract agreement with third party </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ResearchContractAgreementWithThirdParty_lbl" xml:lang="en-US"> Research Contract Agreement with Third Party </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ResearchContractAgreementWithThirdParty_lbl" xml:lang="en-US"> Research contract agreement with third party. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:to="lab_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xml:lang="en-US"> Category of Item Purchased [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:to="lab_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xml:lang="en-US"> Long-term Purchase Commitment, Category of Item Purchased [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementMember" xlink:label="us-gaap_ResearchAndDevelopmentArrangementMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementMember" xlink:to="lab_ResearchAndDevelopmentArrangementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ResearchAndDevelopmentArrangementMember" xml:lang="en-US"> Research and Development Services [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ResearchAndDevelopmentArrangementMember" xml:lang="en-US"> Research and Development Arrangement [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="lab_EarningsPerShareDiluted"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EarningsPerShareDiluted" xml:lang="en-US"> Dilutive effect </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EarningsPerShareDiluted" xml:lang="en-US"> Earnings Per Share, Diluted </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsExercisePrice" xlink:label="us-gaap_FairValueAssumptionsExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsExercisePrice" xlink:to="lab_FairValueAssumptionsExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueAssumptionsExercisePrice" xml:lang="en-US"> Exercise price per share </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssumptionsExercisePrice" xml:lang="en-US"> Fair Value Assumptions, Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLiabilityFairValueNet1" xlink:label="us-gaap_DerivativeLiabilityFairValueNet1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilityFairValueNet1" xlink:to="lab_DerivativeLiabilityFairValueNet1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DerivativeLiabilityFairValueNet1" xml:lang="en-US"> Fair value of the warrant liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativeLiabilityFairValueNet1" xml:lang="en-US"> Derivative Liability, Fair Value, Net </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DerivativeLiabilityTextualAbstract" xlink:label="onvo_DerivativeLiabilityTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DerivativeLiabilityTextualAbstract" xlink:to="onvo_DerivativeLiabilityTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DerivativeLiabilityTextualAbstract_lbl" xml:lang="en-US"> Derivative Liability (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DerivativeLiabilityTextualAbstract_lbl" xml:lang="en-US"> Derivative Liability (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DerivativeLiabilityTextualAbstract_lbl" xml:lang="en-US"> Derivative liability. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsTextBlock" xlink:to="lab_ScheduleOfDerivativeInstrumentsTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfDerivativeInstrumentsTextBlock" xml:lang="en-US"> Assumptions used to value derivative liabilities at closing dates of the Private Placements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfDerivativeInstrumentsTextBlock" xml:lang="en-US"> Schedule of Derivative Instruments [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:to="lab_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xml:lang="en-US"> Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="us-gaap_DerivativesFairValueLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativesFairValueLineItems" xlink:to="lab_DerivativesFairValueLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativesFairValueLineItems" xml:lang="en-US"> Derivatives, Fair Value [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US"> Debt Instrument [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xml:lang="en-US"> Long term Debt Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xml:lang="en-US"> Long term Debt Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="us-gaap_UnsecuredDebtMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnsecuredDebtMember" xlink:to="us-gaap_UnsecuredDebtMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_UnsecuredDebtMember_lbl" xml:lang="en-US"> Unsecured Debt [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnsecuredDebtMember_lbl" xml:lang="en-US"> Unsecured Debt [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US"> Debt Instrument [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US"> Debt Instrument [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantMember" xlink:to="us-gaap_WarrantMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WarrantMember_lbl" xml:lang="en-US"> Warrant [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantMember_lbl" xml:lang="en-US"> Warrant [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PrivatePlacementMember_lbl" xml:lang="en-US"> Private Placement [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrivatePlacementMember_lbl" xml:lang="en-US"> Private Placement [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xml:lang="en-US"> Debt Instrument [Line Items] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConvertibleNotesPayableTextualAbstract" xlink:label="onvo_ConvertibleNotesPayableTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConvertibleNotesPayableTextualAbstract" xlink:to="onvo_ConvertibleNotesPayableTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConvertibleNotesPayableTextualAbstract_lbl" xml:lang="en-US"> Convertible Notes Payable (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConvertibleNotesPayableTextualAbstract_lbl" xml:lang="en-US"> Convertible Notes Payable (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConvertibleNotesPayableTextualAbstract_lbl" xml:lang="en-US"> Convertible notes payable. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US"> Convertible notes, interest rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US"> Debt Instrument, Interest Rate, Stated Percentage </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="us-gaap_RepaymentsOfDebt"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfDebt" xlink:to="us-gaap_RepaymentsOfDebt_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xml:lang="en-US"> Convertible note and accrued interest repaid </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xml:lang="en-US"> Repayments of Debt </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesIssued1" xlink:label="us-gaap_NotesIssued1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesIssued1" xlink:to="us-gaap_NotesIssued1_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NotesIssued1_lbl" xml:lang="en-US"> Convertible Notes issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesIssued1_lbl" xml:lang="en-US"> Notes Issued1 </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="us-gaap_DebtInstrumentMaturityDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US"> Maturity date of convertible Notes issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US"> Debt Instrument Maturity Date </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantsToPurchaseShareOfCommonStock" xlink:label="onvo_WarrantsToPurchaseShareOfCommonStock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantsToPurchaseShareOfCommonStock" xlink:to="onvo_WarrantsToPurchaseShareOfCommonStock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantsToPurchaseShareOfCommonStock_lbl" xml:lang="en-US"> Five-year warrants to purchase shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantsToPurchaseShareOfCommonStock_lbl" xml:lang="en-US"> Warrants to Purchase Share of Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantsToPurchaseShareOfCommonStock_lbl" xml:lang="en-US"> Warrants to purchase share of common stock. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd#invest_InvestmentWarrantsExercisePrice" xlink:label="invest_InvestmentWarrantsExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentWarrantsExercisePrice" xlink:to="invest_InvestmentWarrantsExercisePrice_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="invest_InvestmentWarrantsExercisePrice_lbl" xml:lang="en-US"> Exercise price of warrants, per share </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentWarrantsExercisePrice_lbl" xml:lang="en-US"> Investment Warrants Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments" xlink:label="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments" xlink:to="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_lbl" xml:lang="en-US"> Notes converted </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_lbl" xml:lang="en-US"> Debt Instrument Convertible Number Of Equity Instruments </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate" xlink:label="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate" xlink:to="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate_lbl" xml:lang="en-US"> Interest expense for amortization of debt discount till date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate_lbl" xml:lang="en-US"> Amortization of Debt Discount Premium Recorded Till Date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AmortizationOfDebtDiscountPremiumRecordedTillDate_lbl" xml:lang="en-US"> Amortization of debt discount premium recorded till date. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions" xlink:label="us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions" xlink:to="us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions_lbl" xml:lang="en-US"> Payment to Private placement agent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions_lbl" xml:lang="en-US"> Investment Banking Advisory Brokerage And Underwriting Fees And Commissions </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued" xlink:label="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued" xlink:to="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued_lbl" xml:lang="en-US"> Private placement offering, number of units of securities Issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued_lbl" xml:lang="en-US"> Private Placement Offering Number of Units of Securities Issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementOfferingNumberOfUnitsOfSecuritiesIssued_lbl" xml:lang="en-US"> Private placement offering, number of units of securities issued. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharesIssued" xlink:label="us-gaap_SharesIssued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="lab_SharesIssued"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharesIssued" xml:lang="en-US"> Shares of Common Stock and warrants issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharesIssued" xml:lang="en-US"> Shares, Issued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForCommissions" xlink:label="us-gaap_PaymentsForCommissions"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForCommissions" xlink:to="lab_PaymentsForCommissions"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PaymentsForCommissions" xml:lang="en-US"> Total cash commissions paid to placement agent and selected dealers </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PaymentsForCommissions" xml:lang="en-US"> Payments for Commissions </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharePrice" xlink:label="us-gaap_SharePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="lab_SharePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharePrice" xml:lang="en-US"> Closing price per share of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharePrice" xml:lang="en-US"> Share Price </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ExpenseAllowancePaidToPlacementAgent" xlink:label="onvo_ExpenseAllowancePaidToPlacementAgent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ExpenseAllowancePaidToPlacementAgent" xlink:to="onvo_ExpenseAllowancePaidToPlacementAgent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ExpenseAllowancePaidToPlacementAgent_lbl" xml:lang="en-US"> Expense allowance paid to placement agent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ExpenseAllowancePaidToPlacementAgent_lbl" xml:lang="en-US"> Expense Allowance Paid to Placement Agent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ExpenseAllowancePaidToPlacementAgent_lbl" xml:lang="en-US"> Expense allowance paid to placement agent. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="lab_DerivativeFairValueOfDerivativeLiability"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DerivativeFairValueOfDerivativeLiability" xml:lang="en-US"> Derivative liabilities estimated at fair value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativeFairValueOfDerivativeLiability" xml:lang="en-US"> Derivative Liability, Fair Value, Gross Liability </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DerivativeLiabilitiesExceededProceedsAmount" xlink:label="onvo_DerivativeLiabilitiesExceededProceedsAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DerivativeLiabilitiesExceededProceedsAmount" xlink:to="onvo_DerivativeLiabilitiesExceededProceedsAmount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DerivativeLiabilitiesExceededProceedsAmount_lbl" xml:lang="en-US"> Derivative liabilities exceeded the proceeds, amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DerivativeLiabilitiesExceededProceedsAmount_lbl" xml:lang="en-US"> Derivative Liabilities Exceeded Proceeds Amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DerivativeLiabilitiesExceededProceedsAmount_lbl" xml:lang="en-US"> Derivative liabilities exceeded the proceeds, amount. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="lab_StatementClassOfStockAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StatementClassOfStockAxis" xml:lang="en-US"> Class of Stock [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="lab_ClassOfStockDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfStockDomain" xml:lang="en-US"> Class of Stock [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xml:lang="en-US"> Summary of the Company's restricted stock award activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xml:lang="en-US"> Schedule of Share Based Compensation Restricted Stock Units Award Activity [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US"> Summary of stock option activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US"> Schedule of Share Based Compensation Stock Options Activity [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xml:lang="en-US"> Beginning balance, Unvested, Number of Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xml:lang="en-US"> Ending balance, Unvested, Number of Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xml:lang="en-US"> Granted, Number of Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xml:lang="en-US"> Issuance restricted Common stock to certain employees, advisors and consultants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xml:lang="en-US"> Restricted stock units vested during the period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xml:lang="en-US"> Vested, Number of Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US"> Options Outstanding, Beginning Balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US"> Options Outstanding, Ending Balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xml:lang="en-US"> Granted, Options Outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xml:lang="en-US"> Stock options granted under 2008 equity incentive plan </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="lab_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockIssuedDuringPeriodSharesStockOptionsExercised" xml:lang="en-US"> Issuances of common stock from stock option exercise, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_StockIssuedDuringPeriodSharesStockOptionsExercised" xml:lang="en-US"> Exercised, Options Outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockIssuedDuringPeriodSharesStockOptionsExercised" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xml:lang="en-US"> Vested and Exercisable, Options Outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US"> Weighted-Average Exercise Price, Options Beginning Balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US"> Weighted-Average Exercise Price, Options Ending Balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Options granted, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Granted, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:to="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Options exercised, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Exercised, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xml:lang="en-US"> Vested and Exercisable, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="lab_CommonStockCapitalSharesReservedForFutureIssuance"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CommonStockCapitalSharesReservedForFutureIssuance" xml:lang="en-US"> Common stock reserved for future issuance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_CommonStockCapitalSharesReservedForFutureIssuance" xml:lang="en-US"> Total stock reserved for future issuance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CommonStockCapitalSharesReservedForFutureIssuance" xml:lang="en-US"> Common Stock, Capital Shares Reserved for Future Issuance </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockholdersEquityTextualAbstract" xlink:label="onvo_StockholdersEquityTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockholdersEquityTextualAbstract" xlink:to="onvo_StockholdersEquityTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockholdersEquityTextualAbstract_lbl" xml:lang="en-US"> Stockholders' Equity (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockholdersEquityTextualAbstract_lbl" xml:lang="en-US"> Stockholders' Equity (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockholdersEquityTextualAbstract_lbl" xml:lang="en-US"> Stockholders equity. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_MergerMember" xlink:label="onvo_MergerMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerMember" xlink:to="onvo_MergerMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_MergerMember_lbl" xml:lang="en-US"> Merger [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_MergerMember_lbl" xml:lang="en-US"> Merger [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_MergerMember_lbl" xml:lang="en-US"> Merger. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="lab_AllocatedShareBasedCompensationExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_AllocatedShareBasedCompensationExpense" xml:lang="en-US"> Total employee stock-based compensation recorded as operating expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AllocatedShareBasedCompensationExpense" xml:lang="en-US"> Allocated Share-based Compensation Expense </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="lab_ScheduleOfStockByClassTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfStockByClassTable" xml:lang="en-US"> Schedule of Stock by Class [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="lab_ClassOfStockLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfStockLineItems" xml:lang="en-US"> Class of Stock [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:to="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xml:lang="en-US"> Total unrecognized compensation cost related to unvested stock option grants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xml:lang="en-US"> Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:to="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xml:lang="en-US"> Total unrecognized compensation cost related to unvested stock option grants, weighted average period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:to="lab_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xml:lang="en-US"> Future minimum rental payments required under operating leases that have initial or remaining non-cancellable lease terms in excess of one year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xml:lang="en-US"> Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableAbstract" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableAbstract" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsReceivableAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsReceivableAbstract" xml:lang="en-US"> Future minimum rental payments required under operating leases that have initial or remaining non-cancelable lease terms in excess of one year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsReceivableAbstract" xml:lang="en-US"> Operating Leases, Future Minimum Payments Receivable [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommitmentsAndContingenciesTextualAbstract" xlink:label="onvo_CommitmentsAndContingenciesTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommitmentsAndContingenciesTextualAbstract" xlink:to="onvo_CommitmentsAndContingenciesTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CommitmentsAndContingenciesTextualAbstract_lbl" xml:lang="en-US"> Commitments and Contingencies (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommitmentsAndContingenciesTextualAbstract_lbl" xml:lang="en-US"> Commitments and Contingencies (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommitmentsAndContingenciesTextualAbstract_lbl" xml:lang="en-US"> Commitments and contingencies. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xlink:label="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xlink:to="lab_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xml:lang="en-US"> Base rent escalators </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xml:lang="en-US"> Operating Leases of Lessee, Contingent Rentals, Basis Spread on Variable Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="us-gaap_LeaseAndRentalExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseAndRentalExpense" xlink:to="lab_LeaseAndRentalExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_LeaseAndRentalExpense" xml:lang="en-US"> Rent expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LeaseAndRentalExpense" xml:lang="en-US"> Operating Leases, Rent Expense </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LeaseTermWithOptionToExtend" xlink:label="onvo_LeaseTermWithOptionToExtend"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LeaseTermWithOptionToExtend" xlink:to="onvo_LeaseTermWithOptionToExtend_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LeaseTermWithOptionToExtend_lbl" xml:lang="en-US"> Lease term with option to extend </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LeaseTermWithOptionToExtend_lbl" xml:lang="en-US"> Lease Term with Option to Extend </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LeaseTermWithOptionToExtend_lbl" xml:lang="en-US"> Lease term with an option to extend the lease at the end of the lease term. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock" xlink:label="us-gaap_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock" xlink:to="lab_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock" xml:lang="en-US"> Reverse merger transaction </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock" xml:lang="en-US"> Business Combinations and Other Purchase of Business Transactions, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDueCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueCurrent" xml:lang="en-US"> Base rent under the lease </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueCurrent" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Next Twelve Months </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDue" xml:lang="en-US"> Total </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDue" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xml:lang="en-US"> Summary of the Company's restricted stock award activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xml:lang="en-US"> Summary of stock option activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xml:lang="en-US"> Summary of warrant activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xml:lang="en-US"> Expired / Cancelled Options Outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xml:lang="en-US"> Cancelled, Options Outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Options cancelled, Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Expired / Cancelled Weighted-Average Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock" xlink:to="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xml:lang="en-US"> Common stock reserved for future issuance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xml:lang="en-US"> Common Stock Capital Shares Reserved for Future Issuance [Table Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xml:lang="en-US"> Common stock capital shares reserved for future issuance. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract" xlink:to="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract_lbl" xml:lang="en-US"> Common stock capital shares reserved for future issuance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract_lbl" xml:lang="en-US"> Common Stock Capital Shares Reserved for Future Issuance [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceAbstract_lbl" xml:lang="en-US"> Common stock capital shares reserved for future issuance. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_EquityIncentivePlanTwoThousandEightMember" xlink:label="onvo_EquityIncentivePlanTwoThousandEightMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EquityIncentivePlanTwoThousandEightMember" xlink:to="onvo_EquityIncentivePlanTwoThousandEightMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_EquityIncentivePlanTwoThousandEightMember_lbl" xml:lang="en-US"> Equity Incentive Plan 2008 [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_EquityIncentivePlanTwoThousandEightMember_lbl" xml:lang="en-US"> Equity Incentive Plan Two Thousand Eight [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_EquityIncentivePlanTwoThousandEightMember_lbl" xml:lang="en-US"> Equity incentive plan. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod" xml:lang="en-US"> Restricted common stock to founders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockRestrictedIssuedNumberOfFounders" xlink:label="onvo_CommonStockRestrictedIssuedNumberOfFounders"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockRestrictedIssuedNumberOfFounders" xlink:to="onvo_CommonStockRestrictedIssuedNumberOfFounders_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CommonStockRestrictedIssuedNumberOfFounders_lbl" xml:lang="en-US"> Common stock restricted issued number of founder </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockRestrictedIssuedNumberOfFounders_lbl" xml:lang="en-US"> Common Stock Restricted Issued Number of Founders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockRestrictedIssuedNumberOfFounders_lbl" xml:lang="en-US"> Common stock restricted issued number of founders. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage_lbl" xml:lang="en-US"> Portion of restricted common stock vesting After one year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Vesting Rights One Year Percentage </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightsOneYearPercentage_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award, award vesting rights one year percentage. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage_lbl" xml:lang="en-US"> Portion of restricted common stock vesting over three year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Vesting Right Remaining Portion Quarterly Vesting Percentage </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRightRemainingPortionQuarterlyVestingPercentage_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award vesting right remaining portion quarterly vesting percentage. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_OtherPlanMember" xlink:label="onvo_OtherPlanMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OtherPlanMember" xlink:to="onvo_OtherPlanMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_OtherPlanMember_lbl" xml:lang="en-US"> Other Plan [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_OtherPlanMember_lbl" xml:lang="en-US"> Other Plan [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_OtherPlanMember_lbl" xml:lang="en-US"> Other plan. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:to="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xml:lang="en-US"> Unrecognized stock-based compensation expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xml:lang="en-US"> Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xml:lang="en-US"> Unrecognized stock-based compensation expense recognition maximum weighted average period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xml:lang="en-US"> Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xml:lang="en-US"> Equity Incentive Plan, shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" xlink:to="lab_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" xml:lang="en-US"> Deferred Bonus and Profit Sharing Plan by Title of Individual [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="lab_TitleOfIndividualWithRelationshipToEntityDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_TitleOfIndividualWithRelationshipToEntityDomain" xml:lang="en-US"> Title of Individual with Relationship to Entity [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="lab_AwardTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AwardTypeAxis" xml:lang="en-US"> Award Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xml:lang="en-US"> Award Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xml:lang="en-US"> Restricted stock vesting conditions </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice" xlink:label="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice" xlink:to="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice_lbl" xml:lang="en-US"> Granted incentive stock options to purchase shares of Common stock, exercise price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice_lbl" xml:lang="en-US"> Share Based Compensation Shares Authorized under Stock Option Plans Exercise Price Range Exercise Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice_lbl" xml:lang="en-US"> Share based compensation shares authorized under stock option plans exercise price range exercise price. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockholdersEquityAdditionalTextualAbstract" xlink:label="onvo_StockholdersEquityAdditionalTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockholdersEquityAdditionalTextualAbstract" xlink:to="onvo_StockholdersEquityAdditionalTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockholdersEquityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Stockholders' Equity (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockholdersEquityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Stockholders' Equity (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockholdersEquityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Stockholders' equity. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="lab_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xml:lang="en-US"> Purchase shares of common stock for issued warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xml:lang="en-US"> Class of Warrant or Right, Number of Securities Called by Warrants or Rights </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" xlink:to="lab_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" xml:lang="en-US"> Warrants exercisable price, per share </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" xml:lang="en-US"> Five-year warrants to purchase shares, exercise price per share </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" xml:lang="en-US"> Class of Warrant or Right, Exercise Price of Warrants or Rights </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExercised" xlink:label="onvo_ClassOfWarrantOrRightExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExercised" xlink:to="onvo_ClassOfWarrantOrRightExercised_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExercised_lbl" xml:lang="en-US"> Number of warrant exercised </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExercised_lbl" xml:lang="en-US"> Class of Warrant or Right Exercised </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExercised_lbl" xml:lang="en-US"> Class of warrant or right exercised. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ChangeInFairValueOfDerivativeLiability" xlink:label="onvo_ChangeInFairValueOfDerivativeLiability"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ChangeInFairValueOfDerivativeLiability" xlink:to="onvo_ChangeInFairValueOfDerivativeLiability_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ChangeInFairValueOfDerivativeLiability_lbl" xml:lang="en-US"> Change in fair value of the derivative liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ChangeInFairValueOfDerivativeLiability_lbl" xml:lang="en-US"> Change in Fair Value of Derivative Liability </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ChangeInFairValueOfDerivativeLiability_lbl" xml:lang="en-US"> Change in fair value of derivative liability. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DerivativeLiabilityAdditionalTextualAbstract" xlink:label="onvo_DerivativeLiabilityAdditionalTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DerivativeLiabilityAdditionalTextualAbstract" xlink:to="onvo_DerivativeLiabilityAdditionalTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DerivativeLiabilityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Derivative Liability (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DerivativeLiabilityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Derivative Liability (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DerivativeLiabilityAdditionalTextualAbstract_lbl" xml:lang="en-US"> Derivative liability. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightIssued" xlink:label="onvo_ClassOfWarrantOrRightIssued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightIssued" xlink:to="onvo_ClassOfWarrantOrRightIssued_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightIssued_lbl" xml:lang="en-US"> Warrants Issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightIssued_lbl" xml:lang="en-US"> Class of Warrant or Right Issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightIssued_lbl" xml:lang="en-US"> Class of warrant or right issued. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FairValueAssumptionExpectedDividendRate" xlink:label="onvo_FairValueAssumptionExpectedDividendRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FairValueAssumptionExpectedDividendRate" xlink:to="onvo_FairValueAssumptionExpectedDividendRate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FairValueAssumptionExpectedDividendRate_lbl" xml:lang="en-US"> Dividend yield </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FairValueAssumptionExpectedDividendRate_lbl" xml:lang="en-US"> Fair Value Assumption Expected Dividend Rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FairValueAssumptionExpectedDividendRate_lbl" xml:lang="en-US"> Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightTable" xlink:label="us-gaap_ClassOfWarrantOrRightTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="lab_ClassOfWarrantOrRightTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightTable" xml:lang="en-US"> Class of Warrant or Right [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="lab_ClassOfWarrantOrRightAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightAxis" xml:lang="en-US"> Class of Warrant or Right [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="lab_ClassOfWarrantOrRightDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightDomain" xml:lang="en-US"> Class of Warrant or Right [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightLineItems" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="lab_ClassOfWarrantOrRightLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ClassOfWarrantOrRightLineItems" xml:lang="en-US"> Class of Warrant or Right [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1" xlink:to="lab_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1" xml:lang="en-US"> Convertible notes converted into shares of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssued1" xml:lang="en-US"> Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:to="lab_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xml:lang="en-US"> Issuance of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xml:lang="en-US"> Stock Issued During Period, Shares, Employee Stock Purchase Plans </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCosts" xlink:label="us-gaap_RestructuringCosts"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCosts" xlink:to="lab_RestructuringCosts"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RestructuringCosts" xml:lang="en-US"> Cash transaction costs related to the Merger approximately </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RestructuringCosts" xml:lang="en-US"> Restructuring Costs </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryValuationReserves" xlink:label="us-gaap_InventoryValuationReserves"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryValuationReserves" xlink:to="lab_InventoryValuationReserves"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_InventoryValuationReserves" xml:lang="en-US"> Obsolete inventory reserve </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_InventoryValuationReserves" xml:lang="en-US"> Inventory Valuation Reserves </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:to="lab_PropertyPlantAndEquipmentEstimatedUsefulLives"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PropertyPlantAndEquipmentEstimatedUsefulLives" xml:lang="en-US"> Estimated useful life of the fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentEstimatedUsefulLives" xml:lang="en-US"> Property, Plant and Equipment, Estimated Useful Lives </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:to="lab_ImpairmentOfLongLivedAssetsHeldForUse"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ImpairmentOfLongLivedAssetsHeldForUse" xml:lang="en-US"> Impairment of long-lived assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ImpairmentOfLongLivedAssetsHeldForUse" xml:lang="en-US"> Impairment of Long-Lived Assets Held-for-use </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned" xlink:to="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned" xml:lang="en-US"> Research and development services on a fixed-fee basis </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned" xml:lang="en-US"> Research and Development Arrangement, Contract to Perform for Others, Compensation Earned </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement" xlink:label="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement" xlink:to="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement_lbl" xml:lang="en-US"> Initial payment to the Company from Agreement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement_lbl" xml:lang="en-US"> Initial Payment for Research and Development Services Agreement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_InitialPaymentForResearchAndDevelopmentServicesAgreement_lbl" xml:lang="en-US"> Initial payment for research and development services agreement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees" xlink:label="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees" xlink:to="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees_lbl" xml:lang="en-US"> Remaining payments expected to occur over </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees_lbl" xml:lang="en-US"> Period Remaining Months for Expected Payment of Research and Development Fees </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PeriodRemainingMonthsForExpectedPaymentOfResearchAndDevelopmentFees_lbl" xml:lang="en-US"> Period remaining months for expected payment of research and development fees. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis" xlink:to="lab_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_NoncashOrPartNoncashAcquisitionsByUniqueDescriptionAxis" xml:lang="en-US"> Noncash or Part Noncash Acquisitions by Unique Description [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncashOrPartNoncashAcquisitionNameDomain" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionNameDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashOrPartNoncashAcquisitionNameDomain" xlink:to="lab_NoncashOrPartNoncashAcquisitionNameDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_NoncashOrPartNoncashAcquisitionNameDomain" xml:lang="en-US"> Noncash or Part Noncash Acquisition, Name [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="us-gaap_DeferredFinanceCostsGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsGross" xlink:to="lab_DeferredFinanceCostsGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DeferredFinanceCostsGross" xml:lang="en-US"> Deferred financing costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredFinanceCostsGross" xml:lang="en-US"> Deferred Finance Costs, Gross </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RevenueFromResearchCollaborations" xlink:label="onvo_RevenueFromResearchCollaborations"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RevenueFromResearchCollaborations" xlink:to="onvo_RevenueFromResearchCollaborations_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RevenueFromResearchCollaborations_lbl" xml:lang="en-US"> Revenue related to research contract </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RevenueFromResearchCollaborations_lbl" xml:lang="en-US"> Revenue from Research Collaborations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RevenueFromResearchCollaborations_lbl" xml:lang="en-US"> Revenue from research collaborations. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable" xlink:label="onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable" xlink:to="onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable_lbl" xml:lang="en-US"> Schedule of Significant Accounting Policies Related to Business Acquisition Revenue Recognition and Earnings Per Share [Table] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ScheduleOfSignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareTable_lbl" xml:lang="en-US"> Schedule of significant accounting policies related to business acquisition revenue recognition and earnings per share. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems" xlink:label="onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems" xlink:to="onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems_lbl" xml:lang="en-US"> Significant Accounting Policies Related to Business Acquisition Revenue Recognition and Earnings Per Share [Line Items] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_SignificantAccountingPoliciesRelatedToBusinessAcquisitionRevenueRecognitionAndEarningsPerShareLineItems_lbl" xml:lang="en-US"> Significant accounting policies related to business acquisition revenue recognition and earnings per share. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="lab_AssetsCurrentAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_AssetsCurrentAbstract" xml:lang="en-US"> Current Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AssetsCurrentAbstract" xml:lang="en-US"> Assets, Current [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="lab_LiabilitiesCurrentAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_LiabilitiesCurrentAbstract" xml:lang="en-US"> Current Liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LiabilitiesCurrentAbstract" xml:lang="en-US"> Liabilities, Current [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="us-gaap_UnsecuredDebt"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnsecuredDebt" xlink:to="lab_UnsecuredDebt"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_UnsecuredDebt" xml:lang="en-US"> Unsecured Convertible Note, outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_UnsecuredDebt" xml:lang="en-US"> Unsecured Debt </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementOfferingSecuritiesPrice" xlink:label="onvo_PrivatePlacementOfferingSecuritiesPrice"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementOfferingSecuritiesPrice" xlink:to="onvo_PrivatePlacementOfferingSecuritiesPrice_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementOfferingSecuritiesPrice_lbl" xml:lang="en-US"> Private placement offering, price per unit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementOfferingSecuritiesPrice_lbl" xml:lang="en-US"> Private Placement Offering Securities Price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementOfferingSecuritiesPrice_lbl" xml:lang="en-US"> Private placement offering securities price. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementOfferingSecuritiesValue" xlink:label="onvo_PrivatePlacementOfferingSecuritiesValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementOfferingSecuritiesValue" xlink:to="onvo_PrivatePlacementOfferingSecuritiesValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementOfferingSecuritiesValue_lbl" xml:lang="en-US"> Private placement offering, aggregate purchase price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementOfferingSecuritiesValue_lbl" xml:lang="en-US"> Private Placement Offering Securities Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementOfferingSecuritiesValue_lbl" xml:lang="en-US"> Private placement offering securities value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfSharesToBePurchasedForWarrant" xlink:label="onvo_NumberOfSharesToBePurchasedForWarrant"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfSharesToBePurchasedForWarrant" xlink:to="onvo_NumberOfSharesToBePurchasedForWarrant_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfSharesToBePurchasedForWarrant_lbl" xml:lang="en-US"> Each unit consisted of a convertible note in the principal shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfSharesToBePurchasedForWarrant_lbl" xml:lang="en-US"> Number of Shares to be Purchased for Warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfSharesToBePurchasedForWarrant_lbl" xml:lang="en-US"> Number of shares to be purchased for warrant. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementSecuritiesPricePerUnit" xlink:label="onvo_PrivatePlacementSecuritiesPricePerUnit"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementSecuritiesPricePerUnit" xlink:to="onvo_PrivatePlacementSecuritiesPricePerUnit_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementSecuritiesPricePerUnit_lbl" xml:lang="en-US"> Private placement securities per unit price </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementSecuritiesPricePerUnit_lbl" xml:lang="en-US"> Private Placement Securities Price Per Unit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementSecuritiesPricePerUnit_lbl" xml:lang="en-US"> Private placement securities price per unit. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit" xlink:to="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit_lbl" xml:lang="en-US"> Each unit of Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit_lbl" xml:lang="en-US"> Private Placement Offering Number of Common Stock Included in Each Unit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockIncludedInEachUnit_lbl" xml:lang="en-US"> Private placement offering number of common stock included in each unit. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit" xlink:to="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit_lbl" xml:lang="en-US"> Warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit_lbl" xml:lang="en-US"> Private Placement Offering Number of Common Stock when Warrant Exercised Included in Each Unit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PrivatePlacementOfferingNumberOfCommonStockWhenWarrantExercisedIncludedInEachUnit_lbl" xml:lang="en-US"> Private placement offering number of common stock when warrant exercised included in each unit. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_GrossProceedsFromIssuanceOfPrivatePlacement" xlink:label="onvo_GrossProceedsFromIssuanceOfPrivatePlacement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_GrossProceedsFromIssuanceOfPrivatePlacement" xlink:to="onvo_GrossProceedsFromIssuanceOfPrivatePlacement_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_GrossProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Proceeds under Private Placement, total gross </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_GrossProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Gross Proceeds from Issuance of Private Placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_GrossProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Gross proceeds from issuance of private placement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NetProceedsFromIssuanceOfPrivatePlacement" xlink:label="onvo_NetProceedsFromIssuanceOfPrivatePlacement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NetProceedsFromIssuanceOfPrivatePlacement" xlink:to="onvo_NetProceedsFromIssuanceOfPrivatePlacement_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NetProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Proceeds under Private Placement, total net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NetProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Net Proceeds from Issuance of Private Placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NetProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US"> Net proceeds from issuance of private placement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering" xlink:to="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering_lbl" xml:lang="en-US"> Purchase of share of its Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering_lbl" xml:lang="en-US"> Class of Warrant or Right Number of Securities Called by Warrants or Rights Under Offering </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsUnderOffering_lbl" xml:lang="en-US"> Class of warrant or right number of securities called by warrants or rights under offering. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering" xlink:to="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering_lbl" xml:lang="en-US"> Share issued for warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering_lbl" xml:lang="en-US"> Class of Warrant or Right Number of Securities Called by Warrants or Rights to Holders of Bridge Notes under Offering </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsToHoldersOfBridgeNotesUnderOffering_lbl" xml:lang="en-US"> Class of warrant or right number of securities called by warrants or rights to holders of bridge notes under offering. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock" xlink:label="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock" xlink:to="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock_lbl" xml:lang="en-US"> Issued warrants to placement agent for purchase of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock_lbl" xml:lang="en-US"> Warrants Issued to Placement Agent for Purchase of Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantsIssuedToPlacementAgentForPurchaseOfCommonStock_lbl" xml:lang="en-US"> Warrants issued to placement agent for purchase of common stock. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RegistrationRightsAgreementFilingDeadline" xlink:label="onvo_RegistrationRightsAgreementFilingDeadline"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RegistrationRightsAgreementFilingDeadline" xlink:to="onvo_RegistrationRightsAgreementFilingDeadline_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RegistrationRightsAgreementFilingDeadline_lbl" xml:lang="en-US"> Registration Rights Agreement term </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RegistrationRightsAgreementFilingDeadline_lbl" xml:lang="en-US"> Registration Rights Agreement Filing Deadline </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RegistrationRightsAgreementFilingDeadline_lbl" xml:lang="en-US"> Registration rights agreement filing deadline. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline" xlink:label="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline" xlink:to="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline_lbl" xml:lang="en-US"> Monetary penalties charge on failure of Effectiveness Deadline </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline_lbl" xml:lang="en-US"> Registration Rights Agreement Penalty Percentage on Failure to Meet Effectiveness Deadline </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RegistrationRightsAgreementPenaltyPercentageOnFailureToMeetEffectivenessDeadline_lbl" xml:lang="en-US"> Registration rights agreement penalty percentage on failure to meet effectiveness deadline. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ExpirationOfWarrant" xlink:label="onvo_ExpirationOfWarrant"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ExpirationOfWarrant" xlink:to="onvo_ExpirationOfWarrant_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ExpirationOfWarrant_lbl" xml:lang="en-US"> Expiration of warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ExpirationOfWarrant_lbl" xml:lang="en-US"> Expiration of Warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ExpirationOfWarrant_lbl" xml:lang="en-US"> Expiration of warrant. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xlink:to="lab_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xml:lang="en-US"> Estimated fair values of the liabilities measured on a recurring basis </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock" xml:lang="en-US"> Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NhlbiMember" xlink:label="onvo_NhlbiMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NhlbiMember" xlink:to="onvo_NhlbiMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NhlbiMember_lbl" xml:lang="en-US"> NHLBI [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NhlbiMember_lbl" xml:lang="en-US"> NHLBI [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NhlbiMember_lbl" xml:lang="en-US"> NHLBI. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths" xml:lang="en-US"> Fiscal year ended March 31, 2014 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Next Rolling Twelve Months </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo" xml:lang="en-US"> Fiscal year ended March 31, 2015 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Rolling Year Two </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree" xml:lang="en-US"> Fiscal year ended March 31, 2016 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Rolling Year Three </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour" xml:lang="en-US"> Fiscal year ended March 31, 2017 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Rolling Year Four </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive" xlink:to="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive" xml:lang="en-US"> Fiscal year ended March 31, 2018 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Rolling Year Five </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable" xlink:to="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable_lbl" xml:lang="en-US"> Common Stock Capital Shares Reserved for Future Issuance [Table] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTable_lbl" xml:lang="en-US"> Common stock capital shares reserved for future issuance. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConvertibleNotesPayableAdditionalTextualAbstract" xlink:label="onvo_ConvertibleNotesPayableAdditionalTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConvertibleNotesPayableAdditionalTextualAbstract" xlink:to="onvo_ConvertibleNotesPayableAdditionalTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConvertibleNotesPayableAdditionalTextualAbstract_lbl" xml:lang="en-US"> Convertible Notes Payable (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConvertibleNotesPayableAdditionalTextualAbstract_lbl" xml:lang="en-US"> Convertible Notes Payable (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConvertibleNotesPayableAdditionalTextualAbstract_lbl" xml:lang="en-US"> Convertible notes payable. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DurationAfterWhichWarrantsAreExercisable" xlink:label="onvo_DurationAfterWhichWarrantsAreExercisable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DurationAfterWhichWarrantsAreExercisable" xlink:to="onvo_DurationAfterWhichWarrantsAreExercisable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DurationAfterWhichWarrantsAreExercisable_lbl" xml:lang="en-US"> Warrants maturity term </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DurationAfterWhichWarrantsAreExercisable_lbl" xml:lang="en-US"> Duration after which Warrants are Exercisable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DurationAfterWhichWarrantsAreExercisable_lbl" xml:lang="en-US"> Duration after which warrants are exercisable. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_TwoThousandTwelveEquityIncentivePlanMember" xlink:label="onvo_TwoThousandTwelveEquityIncentivePlanMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TwoThousandTwelveEquityIncentivePlanMember" xlink:to="onvo_TwoThousandTwelveEquityIncentivePlanMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_TwoThousandTwelveEquityIncentivePlanMember_lbl" xml:lang="en-US"> 2012 Equity Incentive Plan [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_TwoThousandTwelveEquityIncentivePlanMember_lbl" xml:lang="en-US"> Two Thousand Twelve Equity Incentive Plan [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_TwoThousandTwelveEquityIncentivePlanMember_lbl" xml:lang="en-US"> 2012 equity incentive plan. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_OutstandingPrincipalAssumedOnAcquisitionMember" xlink:label="onvo_OutstandingPrincipalAssumedOnAcquisitionMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OutstandingPrincipalAssumedOnAcquisitionMember" xlink:to="onvo_OutstandingPrincipalAssumedOnAcquisitionMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_OutstandingPrincipalAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Outstanding Principal Assumed on Acquisition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_OutstandingPrincipalAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Outstanding Principal Assumed on Acquisition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_OutstandingPrincipalAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Outstanding principal assumed on acquisition. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AccruedInterestAssumedOnAcquisitionMember" xlink:label="onvo_AccruedInterestAssumedOnAcquisitionMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AccruedInterestAssumedOnAcquisitionMember" xlink:to="onvo_AccruedInterestAssumedOnAcquisitionMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AccruedInterestAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Accrued Interest Assumed on Acquisition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AccruedInterestAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Accrued Interest Assumed on Acquisition [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AccruedInterestAssumedOnAcquisitionMember_lbl" xml:lang="en-US"> Accrued interest assumed on acquisition. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_UnitAuthorizedUnderPrivatePlacement" xlink:label="onvo_UnitAuthorizedUnderPrivatePlacement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_UnitAuthorizedUnderPrivatePlacement" xlink:to="onvo_UnitAuthorizedUnderPrivatePlacement_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_UnitAuthorizedUnderPrivatePlacement_lbl" xml:lang="en-US"> Private placement offering, number of units of securities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_UnitAuthorizedUnderPrivatePlacement_lbl" xml:lang="en-US"> Unit Authorized under Private Placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_UnitAuthorizedUnderPrivatePlacement_lbl" xml:lang="en-US"> Unit authorized under private placement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConvertibleNotePrincipalAmountConsistedInUnit" xlink:label="onvo_ConvertibleNotePrincipalAmountConsistedInUnit"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConvertibleNotePrincipalAmountConsistedInUnit" xlink:to="onvo_ConvertibleNotePrincipalAmountConsistedInUnit_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConvertibleNotePrincipalAmountConsistedInUnit_lbl" xml:lang="en-US"> Each unit consisted of a convertible note in the principal amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConvertibleNotePrincipalAmountConsistedInUnit_lbl" xml:lang="en-US"> Convertible Note Principal Amount Consisted in Unit </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConvertibleNotePrincipalAmountConsistedInUnit_lbl" xml:lang="en-US"> Convertible note principal amount consisted in unit. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_BusinessAcquisitionConversionRatio" xlink:label="onvo_BusinessAcquisitionConversionRatio"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_BusinessAcquisitionConversionRatio" xlink:to="onvo_BusinessAcquisitionConversionRatio_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_BusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Conversion ratio into common stock on merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_BusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Business Acquisition Conversion Ratio </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_BusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Business acquisition, conversion ratio for common stock, options, warrants and bridge warrants. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:to="lab_PropertyPlantAndEquipmentUsefulLife"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PropertyPlantAndEquipmentUsefulLife" xml:lang="en-US"> Useful life of fixed assets, range </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentUsefulLife" xml:lang="en-US"> Property, Plant and Equipment, Useful Life </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfGrants" xlink:label="onvo_NumberOfGrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfGrants" xlink:to="onvo_NumberOfGrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfGrants_lbl" xml:lang="en-US"> Number of grants issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfGrants_lbl" xml:lang="en-US"> Number of Grants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfGrants_lbl" xml:lang="en-US"> Number of grants. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_UsTreasuryMember" xlink:label="onvo_UsTreasuryMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_UsTreasuryMember" xlink:to="onvo_UsTreasuryMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_UsTreasuryMember_lbl" xml:lang="en-US"> U.S. Treasury [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_UsTreasuryMember_lbl" xml:lang="en-US"> Us Treasury [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_UsTreasuryMember_lbl" xml:lang="en-US"> U.S. Treasury. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_TwelveMonthResearchContractAgreementMember" xlink:label="onvo_TwelveMonthResearchContractAgreementMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TwelveMonthResearchContractAgreementMember" xlink:to="onvo_TwelveMonthResearchContractAgreementMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_TwelveMonthResearchContractAgreementMember_lbl" xml:lang="en-US"> 12 month research contract agreement [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_TwelveMonthResearchContractAgreementMember_lbl" xml:lang="en-US"> Twelve Month Research Contract Agreement [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_TwelveMonthResearchContractAgreementMember_lbl" xml:lang="en-US"> Twelve month research contract agreement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfPrivatePlacementTransactions" xlink:label="onvo_NumberOfPrivatePlacementTransactions"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfPrivatePlacementTransactions" xlink:to="onvo_NumberOfPrivatePlacementTransactions_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfPrivatePlacementTransactions_lbl" xml:lang="en-US"> Number of private placement transactions </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfPrivatePlacementTransactions_lbl" xml:lang="en-US"> Number of Private Placement Transactions </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfPrivatePlacementTransactions_lbl" xml:lang="en-US"> Number of private placement transactions. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsExpectedTerm" xlink:label="us-gaap_FairValueAssumptionsExpectedTerm"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsExpectedTerm" xlink:to="lab_FairValueAssumptionsExpectedTerm"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueAssumptionsExpectedTerm" xml:lang="en-US"> Remaining expected term of underlying securities (years) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssumptionsExpectedTerm" xml:lang="en-US"> Fair Value Assumptions, Expected Term </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract" xlink:label="us-gaap_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract" xlink:to="lab_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract" xml:lang="en-US"> Assumptions used to value derivative liabilities at closing dates of the Private Placements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssumptionsAndMethodologyForAssetsAndLiabilitiesAbstract" xml:lang="en-US"> Fair Value Assumptions and Methodology for Assets and Liabilities [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClosingsOfSubscriptionUnderPrivatePlacement" xlink:label="onvo_ClosingsOfSubscriptionUnderPrivatePlacement"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClosingsOfSubscriptionUnderPrivatePlacement" xlink:to="onvo_ClosingsOfSubscriptionUnderPrivatePlacement_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClosingsOfSubscriptionUnderPrivatePlacement_lbl" xml:lang="en-US"> Closings under the private placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClosingsOfSubscriptionUnderPrivatePlacement_lbl" xml:lang="en-US"> Closings of Subscription Under Private Placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClosingsOfSubscriptionUnderPrivatePlacement_lbl" xml:lang="en-US"> Closings of subscription under private placement. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DebtInstrumentsMaturityDate" xlink:label="onvo_DebtInstrumentsMaturityDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DebtInstrumentsMaturityDate" xlink:to="onvo_DebtInstrumentsMaturityDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DebtInstrumentsMaturityDate_lbl" xml:lang="en-US"> Unsecured Convertible Note, maturity date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DebtInstrumentsMaturityDate_lbl" xml:lang="en-US"> Debt Instruments Maturity Date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DebtInstrumentsMaturityDate_lbl" xml:lang="en-US"> Debt instruments maturity date. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantsPeriod" xlink:label="onvo_WarrantsPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantsPeriod" xlink:to="onvo_WarrantsPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantsPeriod_lbl" xml:lang="en-US"> Period of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantsPeriod_lbl" xml:lang="en-US"> Warrants Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantsPeriod_lbl" xml:lang="en-US"> Warrants, period. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PenaltyPeriod" xlink:label="onvo_PenaltyPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PenaltyPeriod" xlink:to="onvo_PenaltyPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PenaltyPeriod_lbl" xml:lang="en-US"> Penalty period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PenaltyPeriod_lbl" xml:lang="en-US"> Penalty Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PenaltyPeriod_lbl" xml:lang="en-US"> Penalty period. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems" xlink:to="onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems_lbl" xml:lang="en-US"> Common Stock Capital Shares Reserved for Future Issuance [Line Items] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceLineItems_lbl" xml:lang="en-US"> Common stock capital shares reserved for future issuance. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ManagementMember" xlink:label="us-gaap_ManagementMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementMember" xlink:to="lab_ManagementMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ManagementMember" xml:lang="en-US"> CEO and three directors [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ManagementMember" xml:lang="en-US"> Management [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsDisclosureTextBlock" xlink:label="us-gaap_CommitmentsDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsDisclosureTextBlock" xlink:to="lab_CommitmentsDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CommitmentsDisclosureTextBlock" xml:lang="en-US"> Commitments and Contingencies </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CommitmentsDisclosureTextBlock" xml:lang="en-US"> Commitments Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConvertibleNotesPayableDisclosureTextBlock" xlink:label="onvo_ConvertibleNotesPayableDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConvertibleNotesPayableDisclosureTextBlock" xlink:to="onvo_ConvertibleNotesPayableDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConvertibleNotesPayableDisclosureTextBlock_lbl" xml:lang="en-US"> Convertible Notes Payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConvertibleNotesPayableDisclosureTextBlock_lbl" xml:lang="en-US"> Convertible Notes Payable Disclosure [Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConvertibleNotesPayableDisclosureTextBlock_lbl" xml:lang="en-US"> Convertible notes payable. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromWarrantExercises" xlink:label="us-gaap_ProceedsFromWarrantExercises"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromWarrantExercises" xlink:to="lab_ProceedsFromWarrantExercises"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ProceedsFromWarrantExercises" xml:lang="en-US"> Warrant reclassified as equity instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_ProceedsFromWarrantExercises" xml:lang="en-US"> Warrant liability removal due to settlements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ProceedsFromWarrantExercises" xml:lang="en-US"> Proceeds From Warrant Exercises </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CashAndCashEquivalentsMaturityPeriod" xlink:label="onvo_CashAndCashEquivalentsMaturityPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CashAndCashEquivalentsMaturityPeriod" xlink:to="onvo_CashAndCashEquivalentsMaturityPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CashAndCashEquivalentsMaturityPeriod_lbl" xml:lang="en-US"> Maturity of highly liquid investment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CashAndCashEquivalentsMaturityPeriod_lbl" xml:lang="en-US"> Cash and Cash Equivalents Maturity Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CashAndCashEquivalentsMaturityPeriod_lbl" xml:lang="en-US"> Cash and cash equivalents maturity period. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalents" xlink:to="lab_RestrictedCashAndCashEquivalents"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RestrictedCashAndCashEquivalents" xml:lang="en-US"> Additional restricted cash </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RestrictedCashAndCashEquivalents" xml:lang="en-US"> Restricted Cash and Cash Equivalents </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:to="lab_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xml:lang="en-US"> Restricted stock forfeitures, shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xml:lang="en-US"> Restricted stock forfeitures, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xml:lang="en-US"> Stock Issued During Period, Shares, Restricted Stock Award, Forfeited </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ExercisedDerivativeLiabilities" xlink:label="onvo_ExercisedDerivativeLiabilities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ExercisedDerivativeLiabilities" xlink:to="onvo_ExercisedDerivativeLiabilities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ExercisedDerivativeLiabilities_lbl" xml:lang="en-US"> Exercised derivative liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ExercisedDerivativeLiabilities_lbl" xml:lang="en-US"> Exercised Derivative Liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ExercisedDerivativeLiabilities_lbl" xml:lang="en-US"> Exercised derivative liabilities. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_EquityIncentivePlanTwoThousandTwelveMember" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EquityIncentivePlanTwoThousandTwelveMember" xlink:to="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xml:lang="en-US"> Equity Incentive Plan 2012 [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xml:lang="en-US"> Equity Incentive Plan Two Thousand Twelve [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xml:lang="en-US"> Equity incentive plan two thousand twelve. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xml:lang="en-US"> Dividend yield </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xml:lang="en-US"> Volatility </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xml:lang="en-US"> Volatility rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xml:lang="en-US"> Risk-free interest rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xml:lang="en-US"> Risk free factor </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xml:lang="en-US"> Expected life of options </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:to="lab_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xml:lang="en-US"> Fair value of employee stock options </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xml:lang="en-US"> Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xml:lang="en-US"> Fair value of employee stock options </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CommonStockExercise" xlink:label="onvo_CommonStockExercise"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockExercise" xlink:to="onvo_CommonStockExercise_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CommonStockExercise_lbl" xml:lang="en-US"> Warrants exercise </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CommonStockExercise_lbl" xml:lang="en-US"> Common Stock Exercise </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CommonStockExercise_lbl" xml:lang="en-US"> Common stock exercise. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod" xlink:label="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod" xlink:to="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod_lbl" xml:lang="en-US"> Remaining options vest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod_lbl" xml:lang="en-US"> Stock Issued During Period Shares Stock Options Exercised Price Remaining Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockIssuedDuringPeriodSharesStockOptionsExercisedPriceRemainingPeriod_lbl" xml:lang="en-US"> Stock issued during period shares stock options exercised price remaining period. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="lab_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xml:lang="en-US"> Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award [Line Items] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CashlessExerciseForIssuanceOfCommonStock" xlink:label="onvo_CashlessExerciseForIssuanceOfCommonStock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CashlessExerciseForIssuanceOfCommonStock" xlink:to="onvo_CashlessExerciseForIssuanceOfCommonStock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_CashlessExerciseForIssuanceOfCommonStock_lbl" xml:lang="en-US"> Cashless exercise for issuance of common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CashlessExerciseForIssuanceOfCommonStock_lbl" xml:lang="en-US"> Cashless Exercise for Issuance of Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CashlessExerciseForIssuanceOfCommonStock_lbl" xml:lang="en-US"> Cashless exercise for issuance of common stock. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested_lbl" xml:lang="en-US"> Percentage of vesting schedule </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Percentage Option Vested </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOptionVested_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award percentage option vested. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xml:lang="en-US"> Period for vesting schedule over start date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockUnitsRSUMember" xlink:to="lab_RestrictedStockUnitsRSUMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RestrictedStockUnitsRSUMember" xml:lang="en-US"> Restricted Stock Units (RSUs) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RestrictedStockUnitsRSUMember" xml:lang="en-US"> Restricted Stock Units (RSUs) [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="us-gaap_CapitalLeaseObligationsCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsCurrent" xlink:to="lab_CapitalLeaseObligationsCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeaseObligationsCurrent" xml:lang="en-US"> Capital lease obligation, current portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_CapitalLeaseObligationsCurrent" xml:lang="en-US"> Less current portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeaseObligationsCurrent" xml:lang="en-US"> Capital Lease Obligations, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsNoncurrent" xlink:to="lab_CapitalLeaseObligationsNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeaseObligationsNoncurrent" xml:lang="en-US"> Capital lease obligation, net of current portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_CapitalLeaseObligationsNoncurrent" xml:lang="en-US"> Long term portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeaseObligationsNoncurrent" xml:lang="en-US"> Capital Lease Obligations, Noncurrent </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GrantsReceivable" xlink:label="us-gaap_GrantsReceivable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrantsReceivable" xlink:to="lab_GrantsReceivable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_GrantsReceivable" xml:lang="en-US"> Grant receivable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_GrantsReceivable" xml:lang="en-US"> Grants Receivable </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PurchasedEquipmentThroughCapitalLease" xlink:label="onvo_PurchasedEquipmentThroughCapitalLease"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PurchasedEquipmentThroughCapitalLease" xlink:to="onvo_PurchasedEquipmentThroughCapitalLease_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PurchasedEquipmentThroughCapitalLease_lbl" xml:lang="en-US"> Purchased equipment through capital lease </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PurchasedEquipmentThroughCapitalLease_lbl" xml:lang="en-US"> Purchased Equipment Through Capital Lease </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PurchasedEquipmentThroughCapitalLease_lbl" xml:lang="en-US"> Purchased equipment through capital lease. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_TransferredAmountOfInventoryToFixedAssets" xlink:label="onvo_TransferredAmountOfInventoryToFixedAssets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TransferredAmountOfInventoryToFixedAssets" xlink:to="onvo_TransferredAmountOfInventoryToFixedAssets_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_TransferredAmountOfInventoryToFixedAssets_lbl" xml:lang="en-US"> Transferred amount of inventory to fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_TransferredAmountOfInventoryToFixedAssets_lbl" xml:lang="en-US"> Transferred Amount of Inventory to Fixed Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_TransferredAmountOfInventoryToFixedAssets_lbl" xml:lang="en-US"> Transferred amount of inventory to fixed assets. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_GrantsReceivablePolicyTextBlock" xlink:label="onvo_GrantsReceivablePolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_GrantsReceivablePolicyTextBlock" xlink:to="onvo_GrantsReceivablePolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_GrantsReceivablePolicyTextBlock_lbl" xml:lang="en-US"> Grant receivable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_GrantsReceivablePolicyTextBlock_lbl" xml:lang="en-US"> Grants Receivable [Policy Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_GrantsReceivablePolicyTextBlock_lbl" xml:lang="en-US"> Grants receivable. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantOrRightExpenseOrRevenueRecognized" xlink:label="onvo_WarrantOrRightExpenseOrRevenueRecognized"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantOrRightExpenseOrRevenueRecognized" xlink:to="onvo_WarrantOrRightExpenseOrRevenueRecognized_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantOrRightExpenseOrRevenueRecognized_lbl" xml:lang="en-US"> Recognized expenses of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantOrRightExpenseOrRevenueRecognized_lbl" xml:lang="en-US"> Warrant or Right Expense or Revenue Recognized </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantOrRightExpenseOrRevenueRecognized_lbl" xml:lang="en-US"> Warrant or right expense or revenue recognized. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock" xlink:label="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock" xlink:to="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock_lbl" xml:lang="en-US"> Price earned period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock_lbl" xml:lang="en-US"> Warrant Earning Period through Issuance of Common Stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantEarningPeriodThroughIssuanceOfCommonStock_lbl" xml:lang="en-US"> Warrant earning period through issuance of common stock. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightLife" xlink:label="onvo_ClassOfWarrantOrRightLife"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightLife" xlink:to="onvo_ClassOfWarrantOrRightLife_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightLife_lbl" xml:lang="en-US"> Life of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightLife_lbl" xml:lang="en-US"> Class of Warrant or Right Life </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightLife_lbl" xml:lang="en-US"> Class of warrant or right life. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="us-gaap_InventoryWorkInProcess"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcess" xlink:to="lab_InventoryWorkInProcess"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_InventoryWorkInProcess" xml:lang="en-US"> Inventory of work in process </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_InventoryWorkInProcess" xml:lang="en-US"> Inventory, Work in Process, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityFairValueAdjustment" xlink:label="us-gaap_EquityFairValueAdjustment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityFairValueAdjustment" xlink:to="lab_EquityFairValueAdjustment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EquityFairValueAdjustment" xml:lang="en-US"> Estimated fair value of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EquityFairValueAdjustment" xml:lang="en-US"> Equity, Fair Value Adjustment </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfWarrants" xlink:label="us-gaap_ProceedsFromIssuanceOfWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfWarrants" xlink:to="lab_ProceedsFromIssuanceOfWarrants"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ProceedsFromIssuanceOfWarrants" xml:lang="en-US"> Issued warrants in connection with the Reverse Merger and the Private Placement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ProceedsFromIssuanceOfWarrants" xml:lang="en-US"> Aggregate proceeds of Warrants tendered </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ProceedsFromIssuanceOfWarrants" xml:lang="en-US"> Proceeds from Issuance of Warrants </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares" xlink:label="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares" xlink:to="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares_lbl" xml:lang="en-US"> Issued warrants to purchase shares of common stock for consulting services, shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares_lbl" xml:lang="en-US"> Issued Warrants To Purchase Share Of Common Stock For Consulting Services Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuedWarrantsToPurchaseShareOfCommonStockForConsultingServicesShares_lbl" xml:lang="en-US"> Issued warrants to purchase share of common stock for consulting services shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices" xlink:label="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices" xlink:to="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices_lbl" xml:lang="en-US"> Issued warrants to purchase shares of common stock for consulting services </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices_lbl" xml:lang="en-US"> Issued Warrants To Purchase Shares Of Common Stock For Consulting Services </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuedWarrantsToPurchaseSharesOfCommonStockForConsultingServices_lbl" xml:lang="en-US"> Issued warrants to purchase shares of common stock for consulting services. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasedAssetsGross" xlink:label="us-gaap_CapitalLeasedAssetsGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasedAssetsGross" xlink:to="lab_CapitalLeasedAssetsGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasedAssetsGross" xml:lang="en-US"> Lab equipment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasedAssetsGross" xml:lang="en-US"> Capital Leased Assets, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation" xlink:label="us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation" xlink:to="lab_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation" xml:lang="en-US"> Less accumulated depreciation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation" xml:lang="en-US"> Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xlink:label="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xlink:to="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xml:lang="en-US"> Net book value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xml:lang="en-US"> Capital Leases, Balance Sheet, Assets by Major Class, Net </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsDue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDue" xml:lang="en-US"> Total minimum lease payments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDue" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsDueInThreeYears"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xml:lang="en-US"> Fiscal year ended March 31, 2016 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Three Years </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsDueCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueCurrent" xml:lang="en-US"> Fiscal year ended March 31, 2014 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueCurrent" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Next Twelve Months </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsDueInTwoYears"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xml:lang="en-US"> Fiscal year ended March 31, 2015 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Two Years </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xml:lang="en-US"> Present value of minimum lease payments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xml:lang="en-US"> Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xlink:to="lab_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xml:lang="en-US"> Amount representing interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xml:lang="en-US"> Capital Leases, Future Minimum Payments, Interest Included in Payments </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="lab_ScheduleOfPropertyPlantAndEquipmentTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfPropertyPlantAndEquipmentTable" xml:lang="en-US"> Schedule of Property, Plant and Equipment [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="lab_PropertyPlantAndEquipmentByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentByTypeAxis" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="lab_PropertyPlantAndEquipmentTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentTypeDomain" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquipmentMember" xlink:label="us-gaap_EquipmentMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquipmentMember" xlink:to="lab_EquipmentMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EquipmentMember" xml:lang="en-US"> Equipment [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EquipmentMember" xml:lang="en-US"> Equipment [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="lab_PropertyPlantAndEquipmentLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentLineItems" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract" xlink:label="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract" xlink:to="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract" xml:lang="en-US"> Agreement to lease certain laboratory equipment under a non-cancelable capital lease, which is included in fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesBalanceSheetAssetsByMajorClassNetLesseeBalanceSheetAbstract" xml:lang="en-US"> Capital Leases, Balance Sheet, Assets by Major Class, Net [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ContractualObligationFiscalYearMaturityScheduleAbstract" xlink:label="us-gaap_ContractualObligationFiscalYearMaturityScheduleAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractualObligationFiscalYearMaturityScheduleAbstract" xlink:to="lab_ContractualObligationFiscalYearMaturityScheduleAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ContractualObligationFiscalYearMaturityScheduleAbstract" xml:lang="en-US"> Future minimum capital lease payments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ContractualObligationFiscalYearMaturityScheduleAbstract" xml:lang="en-US"> Contractual Obligation, Fiscal Year Maturity Schedule [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AgreementWithConsultantForServicesMember" xlink:label="onvo_AgreementWithConsultantForServicesMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AgreementWithConsultantForServicesMember" xlink:to="onvo_AgreementWithConsultantForServicesMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AgreementWithConsultantForServicesMember_lbl" xml:lang="en-US"> Agreement with Consultant for Services [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AgreementWithConsultantForServicesMember_lbl" xml:lang="en-US"> Agreement with Consultant for Services [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AgreementWithConsultantForServicesMember_lbl" xml:lang="en-US"> Agreement with consultant for services. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock" xlink:label="us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock" xlink:to="lab_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock" xml:lang="en-US"> Future minimum capital lease payments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock" xml:lang="en-US"> Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfCapitalLeasedAsssetsTableTextBlock" xlink:label="us-gaap_ScheduleOfCapitalLeasedAsssetsTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfCapitalLeasedAsssetsTableTextBlock" xlink:to="lab_ScheduleOfCapitalLeasedAsssetsTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfCapitalLeasedAsssetsTableTextBlock" xml:lang="en-US"> Agreement to lease certain laboratory equipment under a non-cancellable capital lease, which is included in fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfCapitalLeasedAsssetsTableTextBlock" xml:lang="en-US"> Schedule of Capital Leased Assets [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio" xlink:label="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio" xlink:to="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Other than common stock business acquisition conversion ratio </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Other than Common Stock Business Acquisition Conversion Ratio </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_OtherThanCommonStockBusinessAcquisitionConversionRatio_lbl" xml:lang="en-US"> Other than common stock business acquisition conversion ratio. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue" xlink:to="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue_lbl" xml:lang="en-US"> Exercised cash proceeds </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue_lbl" xml:lang="en-US"> Class of Warrant or Right Number of Warrants Exercised Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercisedValue_lbl" xml:lang="en-US"> Class of warrant or right number of warrants exercised value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised" xlink:to="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised_lbl" xml:lang="en-US"> Common stock exercised warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised_lbl" xml:lang="en-US"> Class of Warrant or Right Number of Warrants Exercised </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightNumberOfWarrantsExercised_lbl" xml:lang="en-US"> Class of warrant or right number of warrants exercised. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion_lbl" xml:lang="en-US"> Stock Option Granted, Restricted portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Options Granted Restricted Portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedRestrictedPortion_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award options granted restricted portion. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesNoncurrent" xlink:to="lab_DerivativeLiabilitiesNoncurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DerivativeLiabilitiesNoncurrent" xml:lang="en-US"> Warrant liabilities, non-current </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_DerivativeLiabilitiesNoncurrent" xml:lang="en-US"> Warrant liability </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_DerivativeLiabilitiesNoncurrent" xml:lang="en-US"> Derivative Liabilities, Noncurrent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_DerivativeLiabilitiesNoncurrent" xml:lang="en-US"> Derivative Liabilities, Noncurrent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativeLiabilitiesNoncurrent" xml:lang="en-US"> Derivative Liabilities, Noncurrent </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="lab_IncomeTaxDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_IncomeTaxDisclosureTextBlock" xml:lang="en-US"> Income Taxes </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_IncomeTaxDisclosureTextBlock" xml:lang="en-US"> Income Tax Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="lab_IncomeTaxDisclosureAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_IncomeTaxDisclosureAbstract" xml:lang="en-US"> Income Taxes [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ChangeInFairValueOfWarrantLiabilities" xlink:label="onvo_ChangeInFairValueOfWarrantLiabilities"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ChangeInFairValueOfWarrantLiabilities" xlink:to="onvo_ChangeInFairValueOfWarrantLiabilities_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ChangeInFairValueOfWarrantLiabilities_lbl" xml:lang="en-US"> Adjustments to estimated fair value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_ChangeInFairValueOfWarrantLiabilities_lbl" xml:lang="en-US"> Change in fair value of warrant liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ChangeInFairValueOfWarrantLiabilities_lbl" xml:lang="en-US"> Change in Fair Value of Warrant Liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ChangeInFairValueOfWarrantLiabilities_lbl" xml:lang="en-US"> Change in fair value of warrant liabilities. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetAbstract" xlink:label="us-gaap_DeferredTaxAssetsNetAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNetAbstract" xlink:to="lab_DeferredTaxAssetsNetAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DeferredTaxAssetsNetAbstract" xml:lang="en-US"> Deferred tax assets: </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsNetAbstract" xml:lang="en-US"> Deferred Tax Assets, Net [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:to="lab_DeferredTaxAssetsOperatingLossCarryforwards"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DeferredTaxAssetsOperatingLossCarryforwards" xml:lang="en-US"> Net operating loss carry forwards </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsOperatingLossCarryforwards" xml:lang="en-US"> Deferred Tax Assets, Operating Loss Carryforwards </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment" xlink:label="us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment" xlink:to="lab_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DeferredTaxAssetsInProcessResearchAndDevelopment" xml:lang="en-US"> Research and development credits </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsInProcessResearchAndDevelopment" xml:lang="en-US"> Deferred Tax Assets, in Process Research and Development </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xlink:to="lab_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xml:lang="en-US"> Accrued expense and reserves </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xml:lang="en-US"> Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="us-gaap_DeferredTaxAssetsGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="lab_DeferredTaxAssetsGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_DeferredTaxAssetsGross" xml:lang="en-US"> Total deferred tax assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsGross" xml:lang="en-US"> Deferred Tax Assets, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="lab_DeferredTaxAssetsValuationAllowance"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_DeferredTaxAssetsValuationAllowance" xml:lang="en-US"> Valuation allowance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsValuationAllowance" xml:lang="en-US"> Deferred Tax Assets, Valuation Allowance </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="lab_DeferredTaxAssetsLiabilitiesNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_DeferredTaxAssetsLiabilitiesNet" xml:lang="en-US"> Deferred tax assets net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DeferredTaxAssetsLiabilitiesNet" xml:lang="en-US"> Deferred Tax Assets, Net </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IncomeTaxesTextualAbstract" xlink:label="onvo_IncomeTaxesTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncomeTaxesTextualAbstract" xlink:to="onvo_IncomeTaxesTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IncomeTaxesTextualAbstract_lbl" xml:lang="en-US"> Income Taxes (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IncomeTaxesTextualAbstract_lbl" xml:lang="en-US"> Income Taxes (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IncomeTaxesTextualAbstract_lbl" xml:lang="en-US"> Income Taxes Textual. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:to="lab_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ValuationAllowanceDeferredTaxAssetChangeInAmount" xml:lang="en-US"> Valuation Allowance, Deferred Tax Asset, Change in Amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ValuationAllowanceDeferredTaxAssetChangeInAmount" xml:lang="en-US"> Increase/Decrease in valuation allowance </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="us-gaap_OperatingLossCarryforwardsTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsTable" xlink:to="lab_OperatingLossCarryforwardsTable"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLossCarryforwardsTable" xml:lang="en-US"> Operating Loss Carryforwards [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="us-gaap_IncomeTaxAuthorityAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityAxis" xlink:to="lab_IncomeTaxAuthorityAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_IncomeTaxAuthorityAxis" xml:lang="en-US"> Income Tax Authority [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="us-gaap_IncomeTaxAuthorityDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityDomain" xlink:to="lab_IncomeTaxAuthorityDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_IncomeTaxAuthorityDomain" xml:lang="en-US"> Income Tax Authority [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="us-gaap_OperatingLossCarryforwardsLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsLineItems" xlink:to="lab_OperatingLossCarryforwardsLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OperatingLossCarryforwardsLineItems" xml:lang="en-US"> Operating Loss Carryforwards [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:to="lab_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xml:lang="en-US"> Summary of Net Deferred Tax Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xml:lang="en-US"> Schedule of Deferred Tax Assets and Liabilities [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WarrantsAndRightsOutstanding" xlink:label="us-gaap_WarrantsAndRightsOutstanding"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="lab_WarrantsAndRightsOutstanding"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_WarrantsAndRightsOutstanding" xml:lang="en-US"> Estimated fair value of the outstanding warrant liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_WarrantsAndRightsOutstanding" xml:lang="en-US"> Warrants and Rights Outstanding </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DeferredTaxAssetsDepreciationAndAmortization" xlink:label="onvo_DeferredTaxAssetsDepreciationAndAmortization"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DeferredTaxAssetsDepreciationAndAmortization" xlink:to="onvo_DeferredTaxAssetsDepreciationAndAmortization_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DeferredTaxAssetsDepreciationAndAmortization_lbl" xml:lang="en-US"> Depreciation and amortization </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DeferredTaxAssetsDepreciationAndAmortization_lbl" xml:lang="en-US"> Deferred Tax Assets Depreciation and Amortization </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DeferredTaxAssetsDepreciationAndAmortization_lbl" xml:lang="en-US"> Deferred tax assets depreciation and amortization. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="us-gaap_RestrictedStockMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="lab_RestrictedStockMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_RestrictedStockMember" xml:lang="en-US"> Restricted Stock [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RestrictedStockMember" xml:lang="en-US"> Restricted Stock [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="us-gaap_StockOptionsMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionsMember" xlink:to="lab_StockOptionsMember"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockOptionsMember" xml:lang="en-US"> Stock Options [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockOptionsMember" xml:lang="en-US"> Stock Options [Member] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted_lbl" xml:lang="en-US"> Stock Option Granted, Quarterly Vesting Restricted Term </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Quarterly Award Vesting Rights Restricted </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardQuarterlyAwardVestingRightsRestricted_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award quarterly award vesting rights restricted. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived" xlink:label="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived" xlink:to="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Fair value of warrant liabilities in excess of proceeds </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Fair value of warrant liabilities in excess of proceeds received </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Fair Value of Warrant Liabilities in Excess of Proceeds Received </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FairValueOfWarrantLiabilitiesInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Fair value of warrant liabilities in excess of proceeds received. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FinancingTransactionCostsInExcessOfProceedsReceived" xlink:label="onvo_FinancingTransactionCostsInExcessOfProceedsReceived"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FinancingTransactionCostsInExcessOfProceedsReceived" xlink:to="onvo_FinancingTransactionCostsInExcessOfProceedsReceived_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_FinancingTransactionCostsInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Financing transaction costs in excess of proceeds received </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FinancingTransactionCostsInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Financing Transaction Costs in Excess of Proceeds Received </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FinancingTransactionCostsInExcessOfProceedsReceived_lbl" xml:lang="en-US"> Financing transaction costs in excess of proceeds received. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:label="us-gaap_GainLossOnDispositionOfAssets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfAssets" xlink:to="lab_GainLossOnDispositionOfAssets"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_GainLossOnDispositionOfAssets" xml:lang="en-US"> Loss on disposal of fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_GainLossOnDispositionOfAssets" xml:lang="en-US"> Loss on disposal of fixed assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_GainLossOnDispositionOfAssets" xml:lang="en-US"> Gain (Loss) on Disposition of Assets </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockInConnectionWithMerger" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMerger"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockInConnectionWithMerger" xlink:to="onvo_IssuanceOfCommonStockInConnectionWithMerger_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock in connection with merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of Common Stock in Connection With Merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock in connection with merger. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockInConnectionWithMergerShares" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMergerShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockInConnectionWithMergerShares" xlink:to="onvo_IssuanceOfCommonStockInConnectionWithMergerShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance of common stock in connection with merger, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance Of Common Stock In Connection With Merger Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance of common stock in connection with merger shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger" xlink:to="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock through private placements in connection with reverse merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance Of Common Stock Through Private Placements In Connection With Merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock through private placements in connection with reverse merger. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares" xlink:to="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable and accrued interest in connection with merger, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance Of Common Stock Through Conversion Of Notes Payable And Accrued Interest In Connection With Merger Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMergerShares_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable and accrued interest in connection with merger shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_CostsAssociatedWithMerger" xlink:label="onvo_CostsAssociatedWithMerger"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CostsAssociatedWithMerger" xlink:to="onvo_CostsAssociatedWithMerger_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_CostsAssociatedWithMerger_lbl" xml:lang="en-US"> Costs associated with merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_CostsAssociatedWithMerger_lbl" xml:lang="en-US"> Costs Associated With Merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_CostsAssociatedWithMerger_lbl" xml:lang="en-US"> Costs associated with merger. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger" xlink:to="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable and accrued interest in connection with merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance Of Common Stock Through Conversion Of Notes Payable And Accrued Interest In Connection With Merger </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockThroughConversionOfNotesPayableAndAccruedInterestInConnectionWithMerger_lbl" xml:lang="en-US"> Issuance of common stock through conversion of notes payable and accrued interest in connection with merger. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares" xlink:to="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares_lbl" xml:lang="en-US"> Issuance of common stock through private placements in connection with reverse merger, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares_lbl" xml:lang="en-US"> Issuance Of Common Stock Through Private Placements In Connection With Reverse Merger Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfCommonStockThroughPrivatePlacementsInConnectionWithReverseMergerShares_lbl" xml:lang="en-US"> Issuance of common stock through private placements in connection with reverse merger shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises" xlink:label="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises" xlink:to="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Issuance of common stock from warrant exercises, net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Stockholders Equity During Period Value Issuance of Common Stock from Warrant Exercises </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockholdersEquityDuringPeriodValueIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Stockholders equity during period value issuance of common stock from warrant exercises. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises" xlink:label="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises" xlink:to="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Issuance of common stock from warrant exercises, net, Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Stockholders Equity During Period Issuance Of Common Stock From Warrant Exercises </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockholdersEquityDuringPeriodIssuanceOfCommonStockFromWarrantExercises_lbl" xml:lang="en-US"> Stockholders equity during period issuance of common stock from warrant exercises. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="lab_StockIssuedDuringPeriodValueStockOptionsExercised"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockIssuedDuringPeriodValueStockOptionsExercised" xml:lang="en-US"> Issuances of common stock from stock option exercise </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockIssuedDuringPeriodValueStockOptionsExercised" xml:lang="en-US"> Stock Issued During Period, Value, Stock Options Exercised </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfServicesAmortization" xlink:label="us-gaap_CostOfServicesAmortization"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfServicesAmortization" xlink:to="lab_CostOfServicesAmortization"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CostOfServicesAmortization" xml:lang="en-US"> Amortization of warrants issued for services </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CostOfServicesAmortization" xml:lang="en-US"> Cost of Services, Amortization </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_InterestAccruedOnConvertibleNotesPayable" xlink:label="onvo_InterestAccruedOnConvertibleNotesPayable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_InterestAccruedOnConvertibleNotesPayable" xlink:to="onvo_InterestAccruedOnConvertibleNotesPayable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_InterestAccruedOnConvertibleNotesPayable_lbl" xml:lang="en-US"> Interest accrued on convertible notes payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_InterestAccruedOnConvertibleNotesPayable_lbl" xml:lang="en-US"> Interest Accrued on Convertible Notes Payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_InterestAccruedOnConvertibleNotesPayable_lbl" xml:lang="en-US"> Interest accrued on convertible notes payable. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInRestrictedCash" xlink:to="lab_IncreaseDecreaseInRestrictedCash"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_IncreaseDecreaseInRestrictedCash" xml:lang="en-US"> Restricted cash deposits </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_IncreaseDecreaseInRestrictedCash" xml:lang="en-US"> Increase (Decrease) in Restricted Cash </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ProceedsFromIssuanceOfCommonStockAndWarrants" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants" xlink:to="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xml:lang="en-US"> Proceeds from issuance of common stock and exercise of warrants, net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xml:lang="en-US"> Proceeds from Issuance of Common Stock and Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xml:lang="en-US"> Proceeds from issuance of common stock and warrants. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="lab_ProceedsFromStockOptionsExercised"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ProceedsFromStockOptionsExercised" xml:lang="en-US"> Proceeds from exercise of stock options </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ProceedsFromStockOptionsExercised" xml:lang="en-US"> Proceeds from Stock Options Exercised </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:to="lab_RepaymentsOfDebtAndCapitalLeaseObligations"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_RepaymentsOfDebtAndCapitalLeaseObligations" xml:lang="en-US"> Principal payments on capital lease obligations </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_RepaymentsOfDebtAndCapitalLeaseObligations" xml:lang="en-US"> Repayments of Debt and Capital Lease Obligations </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RepaymentOfConvertibleNotesAndInterestPayable" xlink:label="onvo_RepaymentOfConvertibleNotesAndInterestPayable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RepaymentOfConvertibleNotesAndInterestPayable" xlink:to="onvo_RepaymentOfConvertibleNotesAndInterestPayable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_RepaymentOfConvertibleNotesAndInterestPayable_lbl" xml:lang="en-US"> Repayment of convertible notes and interest payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RepaymentOfConvertibleNotesAndInterestPayable_lbl" xml:lang="en-US"> Repayment of Convertible Notes and Interest Payable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RepaymentOfConvertibleNotesAndInterestPayable_lbl" xml:lang="en-US"> Repayment of convertible notes and interest payable. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FeeForAdditionalResearchAndDevelopmentServices" xlink:label="onvo_FeeForAdditionalResearchAndDevelopmentServices"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FeeForAdditionalResearchAndDevelopmentServices" xlink:to="onvo_FeeForAdditionalResearchAndDevelopmentServices_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FeeForAdditionalResearchAndDevelopmentServices_lbl" xml:lang="en-US"> Fee for additional research and development services </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FeeForAdditionalResearchAndDevelopmentServices_lbl" xml:lang="en-US"> Fee for Additional Research and Development Services </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FeeForAdditionalResearchAndDevelopmentServices_lbl" xml:lang="en-US"> Fee for additional research and development services. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod_lbl" xml:lang="en-US"> Restricted stock cancelled </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod_lbl" xml:lang="en-US"> Cancelled / forfeited, Number of Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments other than Options Forfeited and Expirations in Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriod_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award equity instruments other than options forfeited and expirations in period. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants" xlink:to="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants_lbl" xml:lang="en-US"> Warrant liability removed due to exercise of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Warrant Liability From Exercises Of Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityFromExercisesOfWarrants_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Warrant Liability From Exercises Of Warrants. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xml:lang="en-US"> Stock Issued During Period, Shares, Share-based Compensation, Gross </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xml:lang="en-US"> Common shares authorized to be issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xml:lang="en-US"> Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ResearchAndDevelopmentServicesContractValue" xlink:label="onvo_ResearchAndDevelopmentServicesContractValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ResearchAndDevelopmentServicesContractValue" xlink:to="onvo_ResearchAndDevelopmentServicesContractValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ResearchAndDevelopmentServicesContractValue_lbl" xml:lang="en-US"> Total contract value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ResearchAndDevelopmentServicesContractValue_lbl" xml:lang="en-US"> Research and Development Services Contract Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ResearchAndDevelopmentServicesContractValue_lbl" xml:lang="en-US"> Research and development services contract value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination_lbl" xml:lang="en-US"> Additional restricted stock Units were forfeited by one staff member upon termination </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments other than Options Forfeited and Expirations in Period upon Termination </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpirationsInPeriodUponTermination_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award equity instruments other than options forfeited and expirations in period upon termination. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeasesIncomeStatementAmortizationExpense" xlink:label="us-gaap_CapitalLeasesIncomeStatementAmortizationExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesIncomeStatementAmortizationExpense" xlink:to="lab_CapitalLeasesIncomeStatementAmortizationExpense"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalLeasesIncomeStatementAmortizationExpense" xml:lang="en-US"> Depreciation Expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalLeasesIncomeStatementAmortizationExpense" xml:lang="en-US"> Capital Leases, Income Statement, Amortization Expense </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart" xlink:label="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart" xlink:to="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal and state net operating loss carryforwards expiring year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal and State Net Operating Loss Carry Forwards Expiration Year Start </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FederalAndStateNetOperatingLossCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal and state net operating loss carry forwards expiration year start. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart" xlink:label="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart" xlink:to="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal research tax credit carryforwards expiration period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal Research Tax Credit Carry Forwards Expiration Year Start </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FederalResearchTaxCreditCarryForwardsExpirationYearStart_lbl" xml:lang="en-US"> Federal research tax credit carry forwards expiration year start. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="us-gaap_UnrecognizedTaxBenefits"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecognizedTaxBenefits" xlink:to="lab_UnrecognizedTaxBenefits"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_UnrecognizedTaxBenefits" xml:lang="en-US"> Accruals for income tax accounting uncertainties </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_UnrecognizedTaxBenefits" xml:lang="en-US"> Unrecognized Tax Benefits </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:to="lab_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xml:lang="en-US"> Accrued expense regarding interest or penalties </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xml:lang="en-US"> Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:to="lab_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharesPaidForTaxWithholdingForShareBasedCompensation" xml:lang="en-US"> Common stock returned by holders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharesPaidForTaxWithholdingForShareBasedCompensation" xml:lang="en-US"> Shares Paid for Tax Withholding for Share Based Compensation </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingAxis" xlink:label="us-gaap_FinancingAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingAxis" xlink:to="lab_FinancingAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FinancingAxis" xml:lang="en-US"> Financing [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FinancingDomain" xlink:label="us-gaap_FinancingDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingDomain" xlink:to="lab_FinancingDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FinancingDomain" xml:lang="en-US"> Financing [Domain] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicensingAgreementsAndResearchContractsAbstract" xlink:label="onvo_LicensingAgreementsAndResearchContractsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicensingAgreementsAndResearchContractsAbstract" xlink:to="onvo_LicensingAgreementsAndResearchContractsAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicensingAgreementsAndResearchContractsAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicensingAgreementsAndResearchContractsAbstract_lbl" xml:lang="en-US"> Licensing agreements and research contracts. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock" xlink:label="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock" xlink:to="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts Disclosure [Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicensingAgreementsAndResearchContractsDisclosureTextBlock_lbl" xml:lang="en-US"> Licensing agreements and research contracts. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentAbstract" xlink:to="lab_PropertyPlantAndEquipmentAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentAbstract" xml:lang="en-US"> Fixed Assets [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="lab_PropertyPlantAndEquipmentDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PropertyPlantAndEquipmentDisclosureTextBlock" xml:lang="en-US"> Fixed Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentDisclosureTextBlock" xml:lang="en-US"> Property, Plant and Equipment Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:to="lab_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xml:lang="en-US"> Accrued Expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xml:lang="en-US"> Accounts Payable and Accrued Liabilities Disclosure [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="lab_SubsequentEventsTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SubsequentEventsTextBlock" xml:lang="en-US"> Subsequent Events </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SubsequentEventsTextBlock" xml:lang="en-US"> Subsequent Events [Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:to="lab_FairValueOfFinancialInstrumentsPolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueOfFinancialInstrumentsPolicy" xml:lang="en-US"> Financial instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueOfFinancialInstrumentsPolicy" xml:lang="en-US"> Fair Value of Financial Instruments, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="us-gaap_DerivativesPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativesPolicyTextBlock" xlink:to="lab_DerivativesPolicyTextBlock"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DerivativesPolicyTextBlock" xml:lang="en-US"> Derivative financial instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DerivativesPolicyTextBlock" xml:lang="en-US"> Derivatives, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:to="lab_ResearchAndDevelopmentExpensePolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ResearchAndDevelopmentExpensePolicy" xml:lang="en-US"> Research and development </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ResearchAndDevelopmentExpensePolicy" xml:lang="en-US"> Research and Development Expense, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:to="lab_ShareBasedCompensationOptionAndIncentivePlansPolicy"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationOptionAndIncentivePlansPolicy" xml:lang="en-US"> Stock-based compensation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationOptionAndIncentivePlansPolicy" xml:lang="en-US"> Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="lab_PriorPeriodReclassificationAdjustmentDescription"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US"> Reclassifications </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US"> Reclassification, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="lab_SubsequentEventsAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SubsequentEventsAbstract" xml:lang="en-US"> Subsequent Events [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ExpirationDateOfWarrantTenderOffer" xlink:label="onvo_ExpirationDateOfWarrantTenderOffer"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ExpirationDateOfWarrantTenderOffer" xlink:to="onvo_ExpirationDateOfWarrantTenderOffer_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ExpirationDateOfWarrantTenderOffer_lbl" xml:lang="en-US"> Expiration date of Warrant Tender Offer </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ExpirationDateOfWarrantTenderOffer_lbl" xml:lang="en-US"> Expiration Date of Warrant Tender Offer </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ExpirationDateOfWarrantTenderOffer_lbl" xml:lang="en-US"> Expiration date of warrant tender offer. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:to="lab_PropertyPlantAndEquipmentNetAbstract"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_PropertyPlantAndEquipmentNetAbstract" xml:lang="en-US"> Fixed Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentNetAbstract" xml:lang="en-US"> Property, Plant and Equipment, Net [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="us-gaap_MachineryAndEquipmentGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MachineryAndEquipmentGross" xlink:to="lab_MachineryAndEquipmentGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_MachineryAndEquipmentGross" xml:lang="en-US"> Laboratory equipment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_MachineryAndEquipmentGross" xml:lang="en-US"> Machinery and Equipment, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="us-gaap_LeaseholdImprovementsGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsGross" xlink:to="lab_LeaseholdImprovementsGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_LeaseholdImprovementsGross" xml:lang="en-US"> Leasehold improvements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_LeaseholdImprovementsGross" xml:lang="en-US"> Leasehold Improvements, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross" xlink:label="us-gaap_CapitalizedComputerSoftwareGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalizedComputerSoftwareGross" xlink:to="lab_CapitalizedComputerSoftwareGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_CapitalizedComputerSoftwareGross" xml:lang="en-US"> Computer software and equipment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_CapitalizedComputerSoftwareGross" xml:lang="en-US"> Capitalized Computer Software, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FurnitureAndFixturesGross" xlink:label="us-gaap_FurnitureAndFixturesGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesGross" xlink:to="lab_FurnitureAndFixturesGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FurnitureAndFixturesGross" xml:lang="en-US"> Furniture and fixtures </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FurnitureAndFixturesGross" xml:lang="en-US"> Furniture and Fixtures, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="lab_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xml:lang="en-US"> Less accumulated depreciation and amortization </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xml:lang="en-US"> Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FixedAssetsTextualAbstract" xlink:label="onvo_FixedAssetsTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FixedAssetsTextualAbstract" xlink:to="onvo_FixedAssetsTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FixedAssetsTextualAbstract_lbl" xml:lang="en-US"> Fixed Assets (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FixedAssetsTextualAbstract_lbl" xml:lang="en-US"> Fixed Assets (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FixedAssetsTextualAbstract_lbl" xml:lang="en-US"> Fixed assets. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="lab_PropertyPlantAndEquipmentGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_PropertyPlantAndEquipmentGross" xml:lang="en-US"> Fixed assets, gross </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_PropertyPlantAndEquipmentGross" xml:lang="en-US"> Property Plant And Equipment Gross </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AccruedExpensesAbstract" xlink:label="onvo_AccruedExpensesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AccruedExpensesAbstract" xlink:to="onvo_AccruedExpensesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AccruedExpensesAbstract_lbl" xml:lang="en-US"> Summary of Accrued Expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AccruedExpensesAbstract_lbl" xml:lang="en-US"> Accrued Expenses [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AccruedExpensesAbstract_lbl" xml:lang="en-US"> Accrued expenses. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantDiscount" xlink:label="onvo_WarrantDiscount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantDiscount" xlink:to="onvo_WarrantDiscount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantDiscount_lbl" xml:lang="en-US"> Warrant Discount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantDiscount_lbl" xml:lang="en-US"> Warrant Discount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantDiscount_lbl" xml:lang="en-US"> Warrant discount. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xml:lang="en-US"> Weighted average grant date fair value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock" xlink:label="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock" xlink:to="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock_lbl" xml:lang="en-US"> Schedule of Capitalized license fees </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock_lbl" xml:lang="en-US"> Schedule of Capitalized License Fees [Table Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ScheduleOfCapitalizedLicenseFeesTableTextBlock_lbl" xml:lang="en-US"> Schedule of capitalized license fees. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LicenseCosts" xlink:label="us-gaap_LicenseCosts"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LicenseCosts" xlink:to="us-gaap_LicenseCosts_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LicenseCosts_lbl" xml:lang="en-US"> License Costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LicenseCosts_lbl" xml:lang="en-US"> License Costs </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:label="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_lbl" xml:lang="en-US"> Schedule of Indefinite-Lived Intangible Assets [Table] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_UniversityOfMissouriMember" xlink:label="onvo_UniversityOfMissouriMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_UniversityOfMissouriMember" xlink:to="onvo_UniversityOfMissouriMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_UniversityOfMissouriMember_lbl" xml:lang="en-US"> University of Missouri [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_UniversityOfMissouriMember_lbl" xml:lang="en-US"> University of Missouri [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_UniversityOfMissouriMember_lbl" xml:lang="en-US"> University of Missouri. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClemsonUniversityMember" xlink:label="onvo_ClemsonUniversityMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClemsonUniversityMember" xlink:to="onvo_ClemsonUniversityMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClemsonUniversityMember_lbl" xml:lang="en-US"> Clemson University [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClemsonUniversityMember_lbl" xml:lang="en-US"> Clemson University [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClemsonUniversityMember_lbl" xml:lang="en-US"> Clemson University. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_lbl" xml:lang="en-US"> Indefinite-lived Intangible Assets [Line Items] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RoyaltyExpense" xlink:label="us-gaap_RoyaltyExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RoyaltyExpense" xlink:to="us-gaap_RoyaltyExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RoyaltyExpense_lbl" xml:lang="en-US"> Royalty Expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RoyaltyExpense_lbl" xml:lang="en-US"> Royalty Expense </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PriorPatentCostsRelatingToLicenseAgreements" xlink:label="onvo_PriorPatentCostsRelatingToLicenseAgreements"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PriorPatentCostsRelatingToLicenseAgreements" xlink:to="onvo_PriorPatentCostsRelatingToLicenseAgreements_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PriorPatentCostsRelatingToLicenseAgreements_lbl" xml:lang="en-US"> Prior patent costs relating to the license agreements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PriorPatentCostsRelatingToLicenseAgreements_lbl" xml:lang="en-US"> Prior Patent Costs Relating to License Agreements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PriorPatentCostsRelatingToLicenseAgreements_lbl" xml:lang="en-US"> Prior patent costs relating to the license agreements. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock" xlink:label="us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock" xlink:to="us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock_lbl" xml:lang="en-US"> Fixed assets and depreciation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationDepletionAndAmortizationPolicyTextBlock_lbl" xml:lang="en-US"> Depreciation, Depletion, and Amortization [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:to="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xml:lang="en-US"> Summary of warrant activity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xml:lang="en-US"> Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_FairValueAssumptionsExpectedVolatilityRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_FairValueAssumptionsExpectedVolatilityRate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueAssumptionsExpectedVolatilityRate_lbl" xml:lang="en-US"> Expected volatility </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssumptionsExpectedVolatilityRate_lbl" xml:lang="en-US"> Fair value of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssumptionsExpectedVolatilityRate_lbl" xml:lang="en-US"> Fair Value Assumptions, Expected Volatility Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_FairValueAssumptionsRiskFreeInterestRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_FairValueAssumptionsRiskFreeInterestRate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueAssumptionsRiskFreeInterestRate_lbl" xml:lang="en-US"> Risk-free interest rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssumptionsRiskFreeInterestRate_lbl" xml:lang="en-US"> Interest rate </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssumptionsRiskFreeInterestRate_lbl" xml:lang="en-US"> Fair Value Assumptions, Risk Free Interest Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" xml:lang="en-US"> Schedule of Capitalized license fees </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Net [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable" xlink:label="us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable" xlink:to="us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_lbl" xml:lang="en-US"> Schedule Of Research And Development Arrangement Contract To Perform For Others [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xml:lang="en-US"> Finite Lived Intangible Assets By Major Class [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xml:lang="en-US"> Finite Lived Intangible Assets Major Class Name [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="us-gaap_LicensingAgreementsMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LicensingAgreementsMember" xlink:to="us-gaap_LicensingAgreementsMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LicensingAgreementsMember_lbl" xml:lang="en-US"> Licensing Agreements [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LicensingAgreementsMember_lbl" xml:lang="en-US"> Licensing Agreements [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:to="lab_FiniteLivedIntangibleAssetsGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FiniteLivedIntangibleAssetsGross" xml:lang="en-US"> License fees </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FiniteLivedIntangibleAssetsGross" xml:lang="en-US"> Finite-Lived Intangible Assets, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="lab_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_FiniteLivedIntangibleAssetsAccumulatedAmortization" xml:lang="en-US"> Less accumulated amortization </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FiniteLivedIntangibleAssetsAccumulatedAmortization" xml:lang="en-US"> Finite-Lived Intangible Assets, Accumulated Amortization </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="lab_FiniteLivedIntangibleAssetsNet"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FiniteLivedIntangibleAssetsNet" xml:lang="en-US"> Other Assets amortized </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_FiniteLivedIntangibleAssetsNet" xml:lang="en-US"> License fees, net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FiniteLivedIntangibleAssetsNet" xml:lang="en-US"> Finite-Lived Intangible Assets, Net </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="lab_FiniteLivedIntangibleAssetsLineItems"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FiniteLivedIntangibleAssetsLineItems" xml:lang="en-US"> Finite-Lived Intangible Assets [Line Items] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyFeesPercentageMinimum" xlink:label="onvo_RoyaltyFeesPercentageMinimum"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyFeesPercentageMinimum" xlink:to="onvo_RoyaltyFeesPercentageMinimum_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyFeesPercentageMinimum_lbl" xml:lang="en-US"> Royalty fees percentage minimum </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyFeesPercentageMinimum_lbl" xml:lang="en-US"> Royalty Fees Percentage Minimum </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyFeesPercentageMinimum_lbl" xml:lang="en-US"> Royalty fees percentage minimum. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyFeesPercentageMaximum" xlink:label="onvo_RoyaltyFeesPercentageMaximum"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyFeesPercentageMaximum" xlink:to="onvo_RoyaltyFeesPercentageMaximum_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyFeesPercentageMaximum_lbl" xml:lang="en-US"> Royalty fees percentage maximum </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyFeesPercentageMaximum_lbl" xml:lang="en-US"> Royalty Fees Percentage Maximum </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyFeesPercentageMaximum_lbl" xml:lang="en-US"> Royalty fees percentage maximum. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyPayableAnnualAmount" xlink:label="onvo_RoyaltyPayableAnnualAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyPayableAnnualAmount" xlink:to="onvo_RoyaltyPayableAnnualAmount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyPayableAnnualAmount_lbl" xml:lang="en-US"> Minimum annual royalty </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyPayableAnnualAmount_lbl" xml:lang="en-US"> Royalty Payable Annual Amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyPayableAnnualAmount_lbl" xml:lang="en-US"> Royalty payable annual amount. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicenseAgreementExpirationYearStart" xlink:label="onvo_LicenseAgreementExpirationYearStart"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicenseAgreementExpirationYearStart" xlink:to="onvo_LicenseAgreementExpirationYearStart_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicenseAgreementExpirationYearStart_lbl" xml:lang="en-US"> Expected expiration year of license agreement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicenseAgreementExpirationYearStart_lbl" xml:lang="en-US"> License Agreement Expiration Year Start </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicenseAgreementExpirationYearStart_lbl" xml:lang="en-US"> License agreement expiration year start. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xml:lang="en-US"> Balance Sheet Location [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xml:lang="en-US"> Balance Sheet Location [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsMember" xlink:label="us-gaap_OtherAssetsMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsMember" xlink:to="us-gaap_OtherAssetsMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherAssetsMember_lbl" xml:lang="en-US"> Other Assets [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsMember_lbl" xml:lang="en-US"> Other Assets [Member] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate" xlink:label="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate" xlink:to="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate_lbl" xml:lang="en-US"> Additional royalty </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate_lbl" xml:lang="en-US"> Royalty Payable if Sales Not Achieved with Five Years of Effective License Date </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyPayableIfSalesNotAchievedWithFiveYearsOfEffectiveLicenseDate_lbl" xml:lang="en-US"> Royalty payable if sales not achieved with five years of effective license date. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts" xlink:label="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts" xlink:to="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts_lbl" xml:lang="en-US"> Additional license fee to reimburse future patent costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts_lbl" xml:lang="en-US"> License Costs for Reimbursement of Prior and Future Patent Costs </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicenseCostsForReimbursementOfPriorAndFuturePatentCosts_lbl" xml:lang="en-US"> License costs for reimbursement of prior and future patent costs. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicenseAgreementExpirationMonth" xlink:label="onvo_LicenseAgreementExpirationMonth"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicenseAgreementExpirationMonth" xlink:to="onvo_LicenseAgreementExpirationMonth_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicenseAgreementExpirationMonth_lbl" xml:lang="en-US"> Expected expiration year of license agreement </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicenseAgreementExpirationMonth_lbl" xml:lang="en-US"> License Agreement Expiration Month </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicenseAgreementExpirationMonth_lbl" xml:lang="en-US"> License agreement expiration month. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US"> Fixed Assets </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US"> Property, Plant and Equipment [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xml:lang="en-US"> Summary of Accrued Expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xml:lang="en-US"> Schedule of Accrued Liabilities [Table Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants" xlink:label="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants" xlink:to="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants_lbl" xml:lang="en-US"> Outstanding warrants to purchase </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants_lbl" xml:lang="en-US"> Number of Shares to be Exchanged for Amended Outstanding Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfSharesToBeExchangedForAmendedOutstandingWarrants_lbl" xml:lang="en-US"> Number of shares to be exchanged for amended outstanding warrants. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AmountOfWarrantTenderOffer" xlink:label="onvo_AmountOfWarrantTenderOffer"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AmountOfWarrantTenderOffer" xlink:to="onvo_AmountOfWarrantTenderOffer_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AmountOfWarrantTenderOffer_lbl" xml:lang="en-US"> Warrant Tender Offer </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="onvo_AmountOfWarrantTenderOffer_lbl" xml:lang="en-US"> Warrant proceeds </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AmountOfWarrantTenderOffer_lbl" xml:lang="en-US"> Amount of Warrant Tender Offer </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AmountOfWarrantTenderOffer_lbl" xml:lang="en-US"> Amount of warrant tender offer. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfWarrantsNoticeOfRedemptionAffected" xlink:label="onvo_NumberOfWarrantsNoticeOfRedemptionAffected"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfWarrantsNoticeOfRedemptionAffected" xlink:to="onvo_NumberOfWarrantsNoticeOfRedemptionAffected_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfWarrantsNoticeOfRedemptionAffected_lbl" xml:lang="en-US"> Redemption to affected warrant holders </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfWarrantsNoticeOfRedemptionAffected_lbl" xml:lang="en-US"> Number Of Warrants Notice of Redemption Affected </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfWarrantsNoticeOfRedemptionAffected_lbl" xml:lang="en-US"> Number of warrants notice of redemption affected. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RedemptionPricePerShareOfUnexercisedWarrants" xlink:label="onvo_RedemptionPricePerShareOfUnexercisedWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RedemptionPricePerShareOfUnexercisedWarrants" xlink:to="onvo_RedemptionPricePerShareOfUnexercisedWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RedemptionPricePerShareOfUnexercisedWarrants_lbl" xml:lang="en-US"> Redemption price of common stock issuable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RedemptionPricePerShareOfUnexercisedWarrants_lbl" xml:lang="en-US"> Redemption Price Per Share of Unexercised Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RedemptionPricePerShareOfUnexercisedWarrants_lbl" xml:lang="en-US"> Redemption price per share of unexercised warrants. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US"> Total common stock equivalents </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US"> Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Depreciation_lbl" xml:lang="en-US"> Depreciation and amortization expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Depreciation_lbl" xml:lang="en-US"> Depreciation </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="lab_EmployeeRelatedLiabilitiesCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_EmployeeRelatedLiabilitiesCurrent" xml:lang="en-US"> Accrued compensation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EmployeeRelatedLiabilitiesCurrent" xml:lang="en-US"> Employee-related Liabilities, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesCurrent" xlink:to="lab_OtherLiabilitiesCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_OtherLiabilitiesCurrent" xml:lang="en-US"> Other accrued expenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_OtherLiabilitiesCurrent" xml:lang="en-US"> Other Liabilities, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedRentCurrent" xlink:label="us-gaap_AccruedRentCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedRentCurrent" xlink:to="lab_AccruedRentCurrent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_AccruedRentCurrent" xml:lang="en-US"> Deferred rent </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_AccruedRentCurrent" xml:lang="en-US"> Accrued Rent, Current </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DebtInstrumentMaturityYearRangeStart" xlink:label="onvo_DebtInstrumentMaturityYearRangeStart"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DebtInstrumentMaturityYearRangeStart" xlink:to="onvo_DebtInstrumentMaturityYearRangeStart_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DebtInstrumentMaturityYearRangeStart_lbl" xml:lang="en-US"> Debt instrument maturity year range start </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DebtInstrumentMaturityYearRangeStart_lbl" xml:lang="en-US"> Debt Instrument Maturity Year Range Start </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DebtInstrumentMaturityYearRangeStart_lbl" xml:lang="en-US"> Debt instrument maturity year range start. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DebtInstrumentMaturityYearRangeEnd" xlink:label="onvo_DebtInstrumentMaturityYearRangeEnd"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DebtInstrumentMaturityYearRangeEnd" xlink:to="onvo_DebtInstrumentMaturityYearRangeEnd_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DebtInstrumentMaturityYearRangeEnd_lbl" xml:lang="en-US"> Debt instrument maturity year range end </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DebtInstrumentMaturityYearRangeEnd_lbl" xml:lang="en-US"> Debt Instrument Maturity Year Range End </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DebtInstrumentMaturityYearRangeEnd_lbl" xml:lang="en-US"> Debt instrument maturity year range end. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ConversionPriceAsPercentageOfFairMarketValue" xlink:label="onvo_ConversionPriceAsPercentageOfFairMarketValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ConversionPriceAsPercentageOfFairMarketValue" xlink:to="onvo_ConversionPriceAsPercentageOfFairMarketValue_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ConversionPriceAsPercentageOfFairMarketValue_lbl" xml:lang="en-US"> Percentage of per share fair market value of total consideration </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ConversionPriceAsPercentageOfFairMarketValue_lbl" xml:lang="en-US"> Conversion Price as Percentage of Fair Market Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ConversionPriceAsPercentageOfFairMarketValue_lbl" xml:lang="en-US"> Conversion price as percentage of fair market value. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LocalBridgeMember" xlink:label="onvo_LocalBridgeMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LocalBridgeMember" xlink:to="onvo_LocalBridgeMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LocalBridgeMember_lbl" xml:lang="en-US"> Local Bridge [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LocalBridgeMember_lbl" xml:lang="en-US"> Local Bridge [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LocalBridgeMember_lbl" xml:lang="en-US"> Local Bridge [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_FairValueAssumptionsExpectedDividendRate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssumptionsExpectedDividendRate" xlink:to="lab_FairValueAssumptionsExpectedDividendRate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_FairValueAssumptionsExpectedDividendRate" xml:lang="en-US"> Dividend yield </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_FairValueAssumptionsExpectedDividendRate" xml:lang="en-US"> Fair Value Assumptions, Expected Dividend Rate </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtConversionOriginalDebtAmount1" xlink:label="us-gaap_DebtConversionOriginalDebtAmount1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtConversionOriginalDebtAmount1" xlink:to="lab_DebtConversionOriginalDebtAmount1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DebtConversionOriginalDebtAmount1" xml:lang="en-US"> Principal amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_DebtConversionOriginalDebtAmount1" xml:lang="en-US"> Convertible Notes principal balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DebtConversionOriginalDebtAmount1" xml:lang="en-US"> DebtConversionOriginalDebtAmount1 </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DebtConversionAccruedInterestAmount" xlink:label="onvo_DebtConversionAccruedInterestAmount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DebtConversionAccruedInterestAmount" xlink:to="onvo_DebtConversionAccruedInterestAmount_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DebtConversionAccruedInterestAmount_lbl" xml:lang="en-US"> Accrued interest converted </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DebtConversionAccruedInterestAmount_lbl" xml:lang="en-US"> Debt Conversion Accrued Interest Amount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DebtConversionAccruedInterestAmount_lbl" xml:lang="en-US"> Debt conversion accrued interest amount. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="lab_DebtInstrumentConvertibleConversionPrice1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DebtInstrumentConvertibleConversionPrice1" xml:lang="en-US"> Accrued interest converted price range </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DebtInstrumentConvertibleConversionPrice1" xml:lang="en-US"> DebtInstrumentConvertibleConversionPrice1 </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtConversionConvertedInstrumentSharesIssued1" xlink:to="lab_DebtConversionConvertedInstrumentSharesIssued1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DebtConversionConvertedInstrumentSharesIssued1" xml:lang="en-US"> Common stock, shares issued </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_DebtConversionConvertedInstrumentSharesIssued1" xml:lang="en-US"> Common stock issued for conversion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DebtConversionConvertedInstrumentSharesIssued1" xml:lang="en-US"> DebtConversionConvertedInstrumentSharesIssued1 </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExpirationPeriod" xlink:label="onvo_ClassOfWarrantOrRightExpirationPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExpirationPeriod" xlink:to="onvo_ClassOfWarrantOrRightExpirationPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExpirationPeriod_lbl" xml:lang="en-US"> Warrants Expiration Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExpirationPeriod_lbl" xml:lang="en-US"> Class of Warrant or Right Expiration Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExpirationPeriod_lbl" xml:lang="en-US"> Class of warrant or right expiration period. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xlink:to="lab_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xml:lang="en-US"> Warrants classified as equity instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent" xml:lang="en-US"> Debt Instrument, Convertible, Carrying Amount of Equity Component </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="lab_DebtInstrumentUnamortizedDiscount"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_DebtInstrumentUnamortizedDiscount" xml:lang="en-US"> Debt Discount </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_DebtInstrumentUnamortizedDiscount" xml:lang="en-US"> Debt Instrument, Unamortized Discount </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xml:lang="en-US"> Aggregate Intrinsic Value, Options Ending Balance </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xml:lang="en-US"> ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:to="lab_StockIssuedDuringPeriodSharesShareBasedCompensationGross"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xml:lang="en-US"> Shares issued during the year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xml:lang="en-US"> Stock Issued During Period, Shares, Share-based Compensation, Gross </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xml:lang="en-US"> Termination date of Equity Incentive Plan </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xml:lang="en-US"> ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xml:lang="en-US"> Termination date of Equity Incentive Plan, Description </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Expiration Period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award expiration period. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_NumberOfWarrantsExercised" xlink:label="onvo_NumberOfWarrantsExercised"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfWarrantsExercised" xlink:to="onvo_NumberOfWarrantsExercised_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_NumberOfWarrantsExercised_lbl" xml:lang="en-US"> Exercised derivative liabilities </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_NumberOfWarrantsExercised_lbl" xml:lang="en-US"> Number of Warrants Exercised </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_NumberOfWarrantsExercised_lbl" xml:lang="en-US"> Number of warrants exercised. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:to="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xml:lang="en-US"> Options Exercised, Aggregate Intrinsic Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:to="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xml:lang="en-US"> Research and Development Arrangement, Contract to Perform for Others, Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:to="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xml:lang="en-US"> Research and Development Arrangement, Contract to Perform for Others, Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="lab_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xml:lang="en-US"> Weighted average number of shares used in computing net loss per share - basic and diluted </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xml:lang="en-US"> Weighted Average Number of Shares Outstanding, Basic and Diluted </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Weighted average remaining contractual term of options exercisable </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear" xlink:to="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear_lbl" xml:lang="en-US"> Initial royalty payment due </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear_lbl" xml:lang="en-US"> Royalty Payments under License Agreement Due Next Year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueNextYear_lbl" xml:lang="en-US"> Royalty payments under license agreement due next year. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo" xlink:to="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo_lbl" xml:lang="en-US"> Annual royalty payment due </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo_lbl" xml:lang="en-US"> Royalty Payments under License Agreement Due Year Two </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RoyaltyPaymentsUnderLicenseAgreementDueYearTwo_lbl" xml:lang="en-US"> Royalty payments under license agreement due year two. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="us-gaap_AmortizationOfIntangibleAssets"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfIntangibleAssets" xlink:to="us-gaap_AmortizationOfIntangibleAssets_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US"> Amortization expense of licenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xml:lang="en-US"> Amortization of Intangible Assets, Total </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension" xlink:label="us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension" xlink:to="us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension_lbl" xml:lang="en-US"> Weighted average remaining amortization period for all licenses </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetWeightedAveragePeriodBeforeNextRenewalOrExtension_lbl" xml:lang="en-US"> Finite-Lived Intangible Asset, Weighted Average Period before Next Renewal or Extension </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl" xml:lang="en-US"> Annual amortization expense of licenses year 1 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl" xml:lang="en-US"> Annual amortization expense of licenses year 2 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree_lbl" xml:lang="en-US"> Annual amortization expense of licenses year 3 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl" xml:lang="en-US"> Annual amortization expense of licenses year 4 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive_lbl" xml:lang="en-US"> Annual amortization expense of licenses year 5 </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive_lbl" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PerformanceBasedRestrictedStockUnitsRsuMember" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRsuMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PerformanceBasedRestrictedStockUnitsRsuMember" xlink:to="onvo_PerformanceBasedRestrictedStockUnitsRsuMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRsuMember_lbl" xml:lang="en-US"> Performance Based Restricted Stock Units (RSUs) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRsuMember_lbl" xml:lang="en-US"> Performance Based Restricted Stock Units (RSU) [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRsuMember_lbl" xml:lang="en-US"> Performance based restricted stock units (RSU). </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US"> Income taxes </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US"> Income Tax, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:to="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xml:lang="en-US"> Comprehensive income (loss) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xml:lang="en-US"> Comprehensive Income, Policy [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicensingAgreementsAndResearchContractsTextualAbstract" xlink:label="onvo_LicensingAgreementsAndResearchContractsTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicensingAgreementsAndResearchContractsTextualAbstract" xlink:to="onvo_LicensingAgreementsAndResearchContractsTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicensingAgreementsAndResearchContractsTextualAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicensingAgreementsAndResearchContractsTextualAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicensingAgreementsAndResearchContractsTextualAbstract_lbl" xml:lang="en-US"> Licensing agreements and research contracts. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="us-gaap_DerivativeLiabilitiesCurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesCurrent" xlink:to="us-gaap_DerivativeLiabilitiesCurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xml:lang="en-US"> Warrant liabilities, current </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xml:lang="en-US"> Derivative Liabilities, Current </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US"> Net loss per common share - basic and diluted </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US"> Earnings Per Share Basic And Diluted </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LossOnInducementToExercise" xlink:label="onvo_LossOnInducementToExercise"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LossOnInducementToExercise" xlink:to="onvo_LossOnInducementToExercise_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LossOnInducementToExercise_lbl" xml:lang="en-US"> Loss on inducement to exercise warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_LossOnInducementToExercise_lbl" xml:lang="en-US"> Loss on inducement to exercise warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LossOnInducementToExercise_lbl" xml:lang="en-US"> Loss on Inducement to Exercise </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LossOnInducementToExercise_lbl" xml:lang="en-US"> Loss on inducement to exercise. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants" xlink:to="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants_lbl" xml:lang="en-US"> Loss on inducement to exercise warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Loss On Inducement To Exercise Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalLossOnInducementToExerciseWarrants_lbl" xml:lang="en-US"> Adjustments to additional paid in capital loss on inducement to exercise warrants. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares_lbl" xml:lang="en-US"> Stock option granted with immediate vesting </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares_lbl" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Options Grants in Period Upon Return of Common Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUponReturnOfCommonShares_lbl" xml:lang="en-US"> Share based compensation arrangement by share based payment award options grants in period upon return of common shares. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US"> Weighted average remaining contractual term of options outstanding </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_lbl" xml:lang="en-US"> Stock compensation </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_lbl" xml:lang="en-US"> Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DeductionInWarrantLiability" xlink:label="onvo_DeductionInWarrantLiability"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DeductionInWarrantLiability" xlink:to="onvo_DeductionInWarrantLiability_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DeductionInWarrantLiability_lbl" xml:lang="en-US"> Warrant liability reduced </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DeductionInWarrantLiability_lbl" xml:lang="en-US"> Deduction In Warrant Liability </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DeductionInWarrantLiability_lbl" xml:lang="en-US"> Deduction in warrant liability. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights" xlink:label="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights" xlink:to="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights_lbl" xml:lang="en-US"> Exercise price of warrant Amended </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights_lbl" xml:lang="en-US"> Class of Warrant or Right Amended Exercise Price of Warrants or Rights </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightAmendedExercisePriceOfWarrantsOrRights_lbl" xml:lang="en-US"> Class of warrant or right amended exercise price of warrants or rights. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightInducedExerciseExpense" xlink:label="onvo_ClassOfWarrantOrRightInducedExerciseExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightInducedExerciseExpense" xlink:to="onvo_ClassOfWarrantOrRightInducedExerciseExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="onvo_ClassOfWarrantOrRightInducedExerciseExpense_lbl" xml:lang="en-US"> Recognized expenses of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightInducedExerciseExpense_lbl" xml:lang="en-US"> Class of Warrant or Right Induced Exercise Expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightInducedExerciseExpense_lbl" xml:lang="en-US"> Class of warrant or right induced exercise expense. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense" xlink:label="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense" xlink:to="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense_lbl" xml:lang="en-US"> Proceeds received from exercise of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense_lbl" xml:lang="en-US"> Warrant Induced Exercise Placement Agent Fees Legal Cost and Other Fees Expense </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantInducedExercisePlacementAgentFeesLegalCostAndOtherFeesExpense_lbl" xml:lang="en-US"> Warrant induced exercise placement agent fees legal cost and other fees expense. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueRecognitionMultipleElementArrangements" xlink:label="us-gaap_RevenueRecognitionMultipleElementArrangements"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionMultipleElementArrangements" xlink:to="us-gaap_RevenueRecognitionMultipleElementArrangements_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenueRecognitionMultipleElementArrangements_lbl" xml:lang="en-US"> Revenue Arrangements with Multiple Deliverables </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueRecognitionMultipleElementArrangements_lbl" xml:lang="en-US"> Revenue Recognition, Multiple-deliverable Arrangements, Description [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FiscalYearDisclosureTextBlock" xlink:label="onvo_FiscalYearDisclosureTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FiscalYearDisclosureTextBlock" xlink:to="onvo_FiscalYearDisclosureTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FiscalYearDisclosureTextBlock_lbl" xml:lang="en-US"> Change in Fiscal Year End </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FiscalYearDisclosureTextBlock_lbl" xml:lang="en-US"> Fiscal Year Disclosure [Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FiscalYearDisclosureTextBlock_lbl" xml:lang="en-US"> Fiscal year. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueRecognitionSalesOfGoods" xlink:label="us-gaap_RevenueRecognitionSalesOfGoods"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionSalesOfGoods" xlink:to="us-gaap_RevenueRecognitionSalesOfGoods_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenueRecognitionSalesOfGoods_lbl" xml:lang="en-US"> Product Revenue </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueRecognitionSalesOfGoods_lbl" xml:lang="en-US"> Revenue Recognition, Sales of Goods [Policy Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock" xlink:label="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock" xlink:to="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock_lbl" xml:lang="en-US"> Research and Development Revenue Under Collaborative Agreements </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock_lbl" xml:lang="en-US"> Revenue Recognition Research And Development Revenue [Policy Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RevenueRecognitionResearchAndDevelopmentRevenuePolicyTextBlock_lbl" xml:lang="en-US"> Revenue recognition research and development revenue. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_RevenueRecognitionGrantPolicyTextBlock" xlink:label="onvo_RevenueRecognitionGrantPolicyTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_RevenueRecognitionGrantPolicyTextBlock" xlink:to="onvo_RevenueRecognitionGrantPolicyTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_RevenueRecognitionGrantPolicyTextBlock_lbl" xml:lang="en-US"> NIH and U.S. Treasury Grant Revenues </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_RevenueRecognitionGrantPolicyTextBlock_lbl" xml:lang="en-US"> Revenue Recognition Grant [Policy Text Block] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_RevenueRecognitionGrantPolicyTextBlock_lbl" xml:lang="en-US"> Revenue recognition grant. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract" xlink:label="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract" xlink:to="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_LicensingAgreementsAndResearchContractsAdditionalTextualAbstract_lbl" xml:lang="en-US"> Licensing Agreements and Research Contracts (Additional Textual) [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="us-gaap_PayablesAndAccrualsAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_PayablesAndAccrualsAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xml:lang="en-US"> Accrued Expense [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xml:lang="en-US"> Derivative Liability [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityAbstract_lbl" xml:lang="en-US"> Stockholders' Equity [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightUnissued" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightUnissued" xlink:to="us-gaap_ClassOfWarrantOrRightUnissued_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl" xml:lang="en-US"> Cashless exercise of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl" xml:lang="en-US"> Class Of Warrant Or Right Unissued </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xml:lang="en-US"> Vested and Exercisable, Aggregate Intrinsic Value </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_BectonDickinsonMember" xlink:label="onvo_BectonDickinsonMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_BectonDickinsonMember" xlink:to="onvo_BectonDickinsonMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_BectonDickinsonMember_lbl" xml:lang="en-US"> Becton Dickinson [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_BectonDickinsonMember_lbl" xml:lang="en-US"> Becton Dickinson [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_BectonDickinsonMember_lbl" xml:lang="en-US"> Becton Dickinson [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="us-gaap_DeferredRevenueNoncurrent"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueNoncurrent" xlink:to="us-gaap_DeferredRevenueNoncurrent_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xml:lang="en-US"> Deferred revenue, net of current portion </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xml:lang="en-US"> Deferred Revenue Noncurrent </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant" xlink:to="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant_lbl" xml:lang="en-US"> Expense related to modification of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Expense On Modification Of Warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalExpenseOnModificationOfWarrant_lbl" xml:lang="en-US"> Adjustments to additional paid in capital expense on modification of warrant. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity" xlink:to="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity_lbl" xml:lang="en-US"> Warrant liability reclassified to equity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity_lbl" xml:lang="en-US"> Adjustments To Additional Paid In Capital Warrant Liability Reclassified To Equity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_AdjustmentsToAdditionalPaidInCapitalWarrantLiabilityReclassifiedToEquity_lbl" xml:lang="en-US"> Adjustments to additional paid in capital warrant liability reclassified to equity. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_PaymentForExpenseOnWarrantModification" xlink:label="onvo_PaymentForExpenseOnWarrantModification"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PaymentForExpenseOnWarrantModification" xlink:to="onvo_PaymentForExpenseOnWarrantModification_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_PaymentForExpenseOnWarrantModification_lbl" xml:lang="en-US"> Expense associated with warrant modification </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_PaymentForExpenseOnWarrantModification_lbl" xml:lang="en-US"> Payment For Expense On Warrant Modification </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_PaymentForExpenseOnWarrantModification_lbl" xml:lang="en-US"> Payment for expense on warrant modification. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_AccountingPoliciesAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xml:lang="en-US"> Description of Business and Summary of Significant Accounting Policies [Abstract] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:label="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:to="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_lbl" xml:lang="en-US"> Description of Business and Summary of Significant Accounting Policies </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_lbl" xml:lang="en-US"> Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments" xlink:label="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments" xlink:to="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments_lbl" xml:lang="en-US"> Reclassification of warrant </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments_lbl" xml:lang="en-US"> Class Of Warrant Or Right Reclassification From Liability Instruments To Equity Instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightReclassificationFromLiabilityInstrumentsToEquityInstruments_lbl" xml:lang="en-US"> Class of warrant or right reclassification from liability instruments to equity instruments. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights" xlink:label="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights" xlink:to="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Company amendment agreement term year </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Class Of Warrant Or Right Exercise Period Of Warrants Or Rights </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Class of warrant or right exercise period of warrants or rights. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IntellectualPropertyRightFees" xlink:label="onvo_IntellectualPropertyRightFees"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IntellectualPropertyRightFees" xlink:to="onvo_IntellectualPropertyRightFees_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IntellectualPropertyRightFees_lbl" xml:lang="en-US"> Payments to purchase exclusive rights to intellectual property </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IntellectualPropertyRightFees_lbl" xml:lang="en-US"> Intellectual Property Right Fees </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IntellectualPropertyRightFees_lbl" xml:lang="en-US"> Intellectual property right fees. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantReclassifiedEquityInstruments" xlink:label="onvo_WarrantReclassifiedEquityInstruments"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantReclassifiedEquityInstruments" xlink:to="onvo_WarrantReclassifiedEquityInstruments_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantReclassifiedEquityInstruments_lbl" xml:lang="en-US"> Warrant reclassified as equity instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="onvo_WarrantReclassifiedEquityInstruments_lbl" xml:lang="en-US"> Warrant liability reclassified to equity </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantReclassifiedEquityInstruments_lbl" xml:lang="en-US"> Warrant Reclassified Equity Instruments </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantReclassifiedEquityInstruments_lbl" xml:lang="en-US"> Warrant reclassified equity instruments. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityWellKnownSeasonedIssuer" xlink:to="lab_EntityWellKnownSeasonedIssuer"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EntityWellKnownSeasonedIssuer" xml:lang="en-US"> Entity Well-known Seasoned Issuer </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityVoluntaryFilers" xlink:to="lab_EntityVoluntaryFilers"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EntityVoluntaryFilers" xml:lang="en-US"> Entity Voluntary Filers </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="lab_EntityCurrentReportingStatus"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EntityCurrentReportingStatus" xml:lang="en-US"> Entity Current Reporting Status </label>
<loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityPublicFloat" xlink:to="lab_EntityPublicFloat"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_EntityPublicFloat" xml:lang="en-US"> Entity Public Float </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants" xlink:label="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants" xlink:to="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants_lbl" xml:lang="en-US"> Issue of common stock shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants_lbl" xml:lang="en-US"> Stock Issued During Period Shares Cashless Exercise Of Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants_lbl" xml:lang="en-US"> Stock issued during period shares cashless exercise of warrants. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares" xlink:label="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares" xlink:to="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares_lbl" xml:lang="en-US"> Issuance restricted Common stock to certain employees, advisors and consultants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares_lbl" xml:lang="en-US"> Issuance Of Restricted Common Stock To Employees And Non Employees Shares </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IssuanceOfRestrictedCommonStockToEmployeesAndNonEmployeesShares_lbl" xml:lang="en-US"> Issuance of restricted common stock to employees and non employees, shares. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_WarrantsCashlessExerciseNumber" xlink:label="onvo_WarrantsCashlessExerciseNumber"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_WarrantsCashlessExerciseNumber" xlink:to="onvo_WarrantsCashlessExerciseNumber_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_WarrantsCashlessExerciseNumber_lbl" xml:lang="en-US"> Number of warrant exercised through cashless </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_WarrantsCashlessExerciseNumber_lbl" xml:lang="en-US"> Warrants Cashless Exercise Number </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_WarrantsCashlessExerciseNumber_lbl" xml:lang="en-US"> Warrants cashless exercise number. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_lbl" xml:lang="en-US"> Other, net </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_lbl" xml:lang="en-US"> Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch" xlink:to="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_lbl" xml:lang="en-US"> Research tax credit carryforwards </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_lbl" xml:lang="en-US"> Deferred Tax Assets, Tax Credit Carryforwards, Research </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_FederalMember" xlink:label="onvo_FederalMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FederalMember" xlink:to="onvo_FederalMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_FederalMember_lbl" xml:lang="en-US"> Federal [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_FederalMember_lbl" xml:lang="en-US"> Federal [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_FederalMember_lbl" xml:lang="en-US"> Federal [Member] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_StateMember" xlink:label="onvo_StateMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StateMember" xlink:to="onvo_StateMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_StateMember_lbl" xml:lang="en-US"> State [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_StateMember_lbl" xml:lang="en-US"> State [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_StateMember_lbl" xml:lang="en-US"> State [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:to="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_lbl" xml:lang="en-US"> Federal net operating loss carryforwards </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_lbl" xml:lang="en-US"> Deferred Tax Assets, Operating Loss Carryforwards, Domestic </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:to="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_lbl" xml:lang="en-US"> State net operating loss carryforwards </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_lbl" xml:lang="en-US"> Deferred Tax Assets, Operating Loss Carryforwards, State and Local </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis_lbl" xml:lang="en-US"> Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_lbl" xml:lang="en-US"> Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xml:lang="en-US"> Research and Development Expense [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xml:lang="en-US"> Research and Development Expense [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:to="us-gaap_GeneralAndAdministrativeExpenseMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xml:lang="en-US"> General and Administrative Expense [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xml:lang="en-US"> General and Administrative Expense [Member] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xml:lang="en-US"> Warrants to purchase common stock </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xml:lang="en-US"> Class of Warrant or Right, Outstanding </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment" xlink:to="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment_lbl" xml:lang="en-US"> Exercise price of warrants before amendment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment_lbl" xml:lang="en-US"> Class Of Warrant Or Right Exercise Price Of Warrants Before Amendment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsBeforeAmendment_lbl" xml:lang="en-US"> Class of warrant or right exercise price of warrants before amendment. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment" xlink:to="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment_lbl" xml:lang="en-US"> Exercise price of warrants after amendment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment_lbl" xml:lang="en-US"> Class Of Warrant Or Right Exercise Price Of Warrants After Amendment </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExercisePriceOfWarrantsAfterAmendment_lbl" xml:lang="en-US"> Class of warrant or right exercise price of warrants after amendment. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ProceedsFromExerciseOfOtherWarrants" xlink:label="onvo_ProceedsFromExerciseOfOtherWarrants"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ProceedsFromExerciseOfOtherWarrants" xlink:to="onvo_ProceedsFromExerciseOfOtherWarrants_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ProceedsFromExerciseOfOtherWarrants_lbl" xml:lang="en-US"> Additional proceeds from exercise of warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ProceedsFromExerciseOfOtherWarrants_lbl" xml:lang="en-US"> Proceeds From Exercise Of Other Warrants </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ProceedsFromExerciseOfOtherWarrants_lbl" xml:lang="en-US"> Proceeds from exercise of other warrants. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_IncreaseDecreaseInAccruedInterest" xlink:label="onvo_IncreaseDecreaseInAccruedInterest"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseDecreaseInAccruedInterest" xlink:to="onvo_IncreaseDecreaseInAccruedInterest_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_IncreaseDecreaseInAccruedInterest_lbl" xml:lang="en-US"> Accrued interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_IncreaseDecreaseInAccruedInterest_lbl" xml:lang="en-US"> Increase Decrease In Accrued Interest </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_IncreaseDecreaseInAccruedInterest_lbl" xml:lang="en-US"> Increase decrease in accrued interest. </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract" xlink:to="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xml:lang="en-US"> Description of Business and Summary of Significant Accounting Policies (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xml:lang="en-US"> Description Of Business And Summary Of Significant Accounting Policies (Additional Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xml:lang="en-US"> Description Of Business And Summary Of Significant Accounting Policies (Additional Textual) [Abstract] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract" xlink:to="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract_lbl" xml:lang="en-US"> Description Of Business And Summary Of Significant Accounting Policies (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract_lbl" xml:lang="en-US"> Description Of Business And Summary Of Significant Accounting Policies (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTextualAbstract_lbl" xml:lang="en-US"> Description of business and summary of significant accounting policies. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTable_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTable_lbl" xml:lang="en-US"> Subsequent Event [Table] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xml:lang="en-US"> Subsequent Event [Line Items] </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_SubsequentEventsTextualAbstract" xlink:label="onvo_SubsequentEventsTextualAbstract"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_SubsequentEventsTextualAbstract" xlink:to="onvo_SubsequentEventsTextualAbstract_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_SubsequentEventsTextualAbstract_lbl" xml:lang="en-US"> Subsequent Events (Textual) [Abstract] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_SubsequentEventsTextualAbstract_lbl" xml:lang="en-US"> Subsequent Events (Textual) (Abstract) </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_SubsequentEventsTextualAbstract_lbl" xml:lang="en-US"> Subsequent Events (Textual) (Abstract) </label>
<loc xlink:type="locator" xlink:href="onvo-20130331.xsd#onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights" xlink:label="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights" xlink:to="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Extended exercise period </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Class of Warrant or Right Extended Exercise Period of Warrants or Rights </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="onvo_ClassOfWarrantOrRightExtendedExercisePeriodOfWarrantsOrRights_lbl" xml:lang="en-US"> Class of warrant or right extended exercise period of warrants or rights. </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US"> Subsequent Event Type [Axis] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US"> Subsequent Event Type [Domain] </label>
<loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
<labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US"> Subsequent Event [Member] </label>
<label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US"> Subsequent Event [Member] </label>
</labelLink>
</linkbase>

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