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Organovo Holdings, Inc. – ‘10-Q’ for 12/31/19 – ‘EX-101.LAB’

On:  Monday, 2/10/20, at 4:06pm ET   ·   For:  12/31/19   ·   Accession #:  1564590-20-4042   ·   File #:  1-35996

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

 2/10/20  Organovo Holdings, Inc.           10-Q       12/31/19   59:6M                                     ActiveDisclosure/FA

Quarterly Report   —   Form 10-Q   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML    570K 
 2: EX-31.1     Certification -- §302 - SOA'02                      HTML     24K 
 3: EX-31.2     Certification -- §302 - SOA'02                      HTML     24K 
 4: EX-32.1     Certification -- §906 - SOA'02                      HTML     23K 
42: R1          Document and Entity Information                     HTML     75K 
13: R2          Condensed Consolidated Balance Sheets               HTML     94K 
31: R3          Condensed Consolidated Balance Sheets               HTML     29K 
                (Parenthetical)                                                  
47: R4          Unaudited Condensed Consolidated Statements of      HTML     73K 
                Operations and Other Comprehensive Loss                          
43: R5          Unaudited Condensed Consolidated Statements of      HTML     73K 
                Stockholders' Equity                                             
16: R6          Unaudited Condensed Consolidated Statements of      HTML    110K 
                Cash Flows                                                       
33: R7          Description of Business                             HTML     35K 
49: R8          Summary of Significant Accounting Policies          HTML     68K 
40: R9          Stockholders' Equity                                HTML    271K 
30: R10         Collaborative Research, Development, and License    HTML     27K 
                Agreements                                                       
18: R11         Commitments and Contingencies                       HTML     28K 
41: R12         Leases                                              HTML     80K 
50: R13         Concentrations                                      HTML     24K 
29: R14         Related Parties                                     HTML     26K 
17: R15         Restructuring                                       HTML     72K 
39: R16         Subsequent Events                                   HTML     23K 
48: R17         Summary of Significant Accounting Policies          HTML     84K 
                (Policies)                                                       
32: R18         Stockholders' Equity (Tables)                       HTML    269K 
14: R19         Leases (Tables)                                     HTML     68K 
36: R20         Restructuring (Tables)                              HTML     73K 
56: R21         Description of Business - Additional Information    HTML     65K 
                (Detail)                                                         
24: R22         Summary of Significant Accounting Policies -        HTML    144K 
                Additional Information (Detail)                                  
20: R23         Stockholders' Equity - Schedule of Stock-based      HTML     29K 
                Compensation Expense (Detail)                                    
35: R24         Stockholders' Equity - Stock-based Compensation     HTML     36K 
                Expense and Valuation Information - Additional                   
                Information (Detail)                                             
55: R25         Stockholders' Equity - Fair Value of Employee       HTML     34K 
                Stock Options (Detail)                                           
23: R26         Stockholders' Equity - Fair Value of Employee       HTML     21K 
                Stock Options (Parenthetical) (Detail)                           
19: R27         Stockholders' Equity - Fair Value of Employee       HTML     48K 
                Stock Purchase Plan (Detail)                                     
34: R28         Stockholders' Equity - Fair Value of Employee       HTML     24K 
                Stock Purchase Plan (Parenthetical) (Detail)                     
57: R29         Stockholders' Equity - Preferred Stock -            HTML     24K 
                Additional Information (Detail)                                  
53: R30         Stockholders' Equity - Common Stock - Additional    HTML     63K 
                Information (Detail)                                             
44: R31         Stockholders' Equity - Summary of Company's         HTML     49K 
                Restricted Stock Units Activity and                              
                Performance-Based Restricted Stock Units Activity                
                (Detail)                                                         
11: R32         Stockholders' Equity - Restricted Stock Awards,     HTML     89K 
                Restricted Stock Units and Performance-Based                     
                Restricted Stock Units - Additional Information                  
                (Detail)                                                         
27: R33         Stockholders' Equity - Summary of Stock Option      HTML     55K 
                Activity (Detail)                                                
54: R34         Stockholders' Equity - Stock Options and Employee   HTML     54K 
                Stock Purchase Plan - Additional Information                     
                (Detail)                                                         
45: R35         Stockholders' Equity - Summary of Warrant Activity  HTML     46K 
                (Detail)                                                         
12: R36         Stockholders' Equity - Warrants - Additional        HTML     21K 
                Information (Detail)                                             
28: R37         Stockholders' Equity - Common Stock Reserved for    HTML     38K 
                Future Issuance (Detail)                                         
51: R38         Collaborative Research, Development, and License    HTML     46K 
                Agreements - Additional Information (Detail)                     
46: R39         Leases - Additional Information (Details)           HTML     72K 
58: R40         Leases - Schedule of Impact of Adoption of ASC 842  HTML     45K 
                on Consolidated Balance Sheet (Details)                          
37: R41         Leases - Summary of Cash Flows Associated with      HTML     22K 
                Company's Leases (Details)                                       
21: R42         Related Parties - Additional Information (Detail)   HTML     46K 
26: R43         Restructuring - Additional Information (Details)    HTML     37K 
59: R44         Restructuring - Summary of Restructuring Charges    HTML     31K 
                Recorded in Selling, General and Administrative                  
                Expenses (Details)                                               
38: R45         Restructuring - Summary of Activity and Balances    HTML     36K 
                of Restructuring Reserve (Details)                               
22: R46         Subsequent Events - Additional Information          HTML     24K 
                (Detail)                                                         
25: XML         IDEA XML File -- Filing Summary                      XML    106K 
52: EXCEL       IDEA Workbook of Financial Reports                  XLSX     72K 
 5: EX-101.INS  XBRL Instance -- onvo-20191231                       XML   1.63M 
 7: EX-101.CAL  XBRL Calculations -- onvo-20191231_cal               XML     94K 
 8: EX-101.DEF  XBRL Definitions -- onvo-20191231_def                XML    552K 
 9: EX-101.LAB  XBRL Labels -- onvo-20191231_lab                     XML   1.02M 
10: EX-101.PRE  XBRL Presentations -- onvo-20191231_pre              XML    819K 
 6: EX-101.SCH  XBRL Schema -- onvo-20191231                         XSD    146K 
15: ZIP         XBRL Zipped Folder -- 0001564590-20-004042-xbrl      Zip    134K

‘EX-101.LAB’   —   XBRL Labels — onvo-20191231_lab

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
<?xml version="1.0" standalone="yes" encoding="windows-1252"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date : 2020-02-09T10:50:44.6586155+00:00 -->
<!-- Version : 5.0.1.321 -->
<!-- Package ID : 0be5ba56ae7c4938bb35fdf5a4b01245 -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple"/>
<link:roleRef roleURI="http://fasb.org/us-gaap/role/label/axisDefault" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd#axisDefault" xlink:type="simple"/>
<link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Central Index Key </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract"/>
<link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cover [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Type </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag"/>
<link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amendment Flag </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Amendment Flag </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Period End Date </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Period End Date </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalYearFocus"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Year Focus </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Year Focus </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalPeriodFocus"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Period Focus </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Period Focus </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol"/>
<link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Trading Symbol </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Trading Symbol </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Entity Registrant Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Registrant Name </link:label>
<link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Central Index Key </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:type="locator" xlink:label="dei_CurrentFiscalYearEndDate"/>
<link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Fiscal Year End Date </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Current Fiscal Year End Date </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:type="locator" xlink:label="dei_EntityFilerCategory"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Filer Category </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Filer Category </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany" xlink:type="locator" xlink:label="dei_EntityShellCompany"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Shell Company </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Shell Company </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness" xlink:type="locator" xlink:label="dei_EntitySmallBusiness"/>
<link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Small Business </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Small Business </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Emerging Growth Company </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Emerging Growth Company </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:type="locator" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Common Stock, Shares Outstanding </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Common Stock Shares Outstanding </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity File Number </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity File Number </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:type="locator" xlink:label="dei_EntityCurrentReportingStatus"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Current Reporting Status </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Current Reporting Status </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Tax Identification Number </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Tax Identification Number </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Address Line One </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Address Line1 </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine2"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Entity Address, Address Line Two </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Address Line2 </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, City or Town </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address City Or Town </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, State or Province </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address State Or Province </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Postal Zip Code </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Postal Zip Code </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode"/>
<link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> City Area Code </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> City Area Code </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber"/>
<link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Local Phone Number </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Local Phone Number </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:type="locator" xlink:label="dei_EntityInteractiveDataCurrent"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Interactive Data Current </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityInteractiveDataCurrent" xlink:to="dei_EntityInteractiveDataCurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Interactive Data Current </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle"/>
<link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Title of 12(b) Security </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Security12b Title </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName"/>
<link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Security Exchange Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Security Exchange Name </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Incorporation, State or Country Code </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Incorporation State Country Code </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport" xlink:type="locator" xlink:label="dei_DocumentQuarterlyReport"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Quarterly Report </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentQuarterlyReport" xlink:to="dei_DocumentQuarterlyReport_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Quarterly Report </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport" xlink:type="locator" xlink:label="dei_DocumentTransitionReport"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Transition Report </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentTransitionReport" xlink:to="dei_DocumentTransitionReport_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Transition Report </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Financial Position [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsCurrentAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Assets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash and cash equivalents </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash And Cash Equivalents At Carrying Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableNetCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts receivable </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNetCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Receivable Net Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrantsReceivable" xlink:type="locator" xlink:label="us-gaap_GrantsReceivable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GrantsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Grant receivable </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrantsReceivable" xlink:to="us-gaap_GrantsReceivable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GrantsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Grants Receivable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:type="locator" xlink:label="us-gaap_InventoryNet"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inventory, net </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="locator" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Prepaid expenses and other current assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Prepaid Expense And Other Assets Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:type="locator" xlink:label="us-gaap_AssetsCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total current assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fixed assets, net </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Property Plant And Equipment Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashNoncurrent" xlink:type="locator" xlink:label="us-gaap_RestrictedCashNoncurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted cash </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashNoncurrent" xlink:to="us-gaap_RestrictedCashNoncurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:type="locator" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other assets, net </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Assets Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Liabilities and Stockholders’ Equity </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities And Stockholders Equity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Liabilities </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Payable Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued expenses </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accrued Liabilities Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred revenue </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityCurrent" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract With Customer Liability Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRentCreditCurrent" xlink:type="locator" xlink:label="us-gaap_DeferredRentCreditCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCreditCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred rent </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRentCreditCurrent" xlink:to="us-gaap_DeferredRentCreditCurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCreditCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Rent Credit Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total current liabilities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRentCreditNoncurrent" xlink:type="locator" xlink:label="us-gaap_DeferredRentCreditNoncurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCreditNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred rent, net of current portion </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRentCreditNoncurrent" xlink:to="us-gaap_DeferredRentCreditNoncurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCreditNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Rent Credit Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:type="locator" xlink:label="us-gaap_Liabilities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total liabilities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingencies"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commitments and Contingencies </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments And Contingencies </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders’ Equity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:type="locator" xlink:label="us-gaap_CommonStockValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock, $0.001 par value; 200,000,000 shares authorized, 130,497,563 and 124,015,429 shares issued and outstanding at December 31, 2019 and March 31, 2019, respectively </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional paid-in capital </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid In Capital Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated deficit </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Retained Earnings Accumulated Deficit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total stockholders’ equity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Liabilities and Stockholders’ Equity </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities And Stockholders Equity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock, par value </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Par Or Stated Value Per Share </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock, shares authorized </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Shares Authorized </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock, shares issued </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Shares Issued </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock, shares outstanding </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Shares Outstanding </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Table] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Product and Service </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Product Or Service [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Product and Service </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Products And Services [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ProductsAndServicesMember" xlink:type="locator" xlink:label="onvo_ProductsAndServicesMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ProductsAndServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Products and services. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ProductsAndServicesMember" xlink:to="onvo_ProductsAndServicesMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ProductsAndServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Products and Services [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ProductsAndServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Products And Services [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LicenseAndServiceMember" xlink:type="locator" xlink:label="us-gaap_LicenseAndServiceMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LicenseAndServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborations and Licenses [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LicenseAndServiceMember" xlink:to="us-gaap_LicenseAndServiceMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LicenseAndServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> License And Service [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrantMember" xlink:type="locator" xlink:label="us-gaap_GrantMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Grants [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrantMember" xlink:to="us-gaap_GrantMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Grant [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Line Items] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueAbstract" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenues </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueAbstract" xlink:to="us-gaap_DisaggregationOfRevenueAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Disaggregation Of Revenue [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total Revenues </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue From Contract With Customer Excluding Assessed Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:type="locator" xlink:label="us-gaap_CostOfGoodsAndServicesSold"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cost of revenues </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsAndServicesSold" xlink:to="us-gaap_CostOfGoodsAndServicesSold_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cost Of Goods And Services Sold </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and development expenses </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:type="locator" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Selling, general and administrative expenses </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Selling General And Administrative Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpenses" xlink:type="locator" xlink:label="us-gaap_CostsAndExpenses"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostsAndExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total costs and expenses </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpenses" xlink:to="us-gaap_CostsAndExpenses_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostsAndExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Costs And Expenses </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:type="locator" xlink:label="us-gaap_OperatingIncomeLoss"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Loss from Operations </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Income Loss </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:type="locator" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other Income (Expense) </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Nonoperating Income Expense [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:type="locator" xlink:label="us-gaap_GainLossOnDispositionOfAssets"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Gain (loss) on fixed asset disposals </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfAssets" xlink:to="us-gaap_GainLossOnDispositionOfAssets_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Gain Loss On Disposition Of Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnTerminationOfLease" xlink:type="locator" xlink:label="us-gaap_GainLossOnTerminationOfLease"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Gain on lease termination </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnTerminationOfLease" xlink:to="us-gaap_GainLossOnTerminationOfLease_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Gain Loss On Termination Of Lease </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:type="locator" xlink:label="us-gaap_InvestmentIncomeInterest"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest income </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Investment Income Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other Income (Expense) </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Nonoperating Income Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:type="locator" xlink:label="us-gaap_NonoperatingIncomeExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Other Income </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Nonoperating Income Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Income Tax Expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Tax Expense Benefit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:type="locator" xlink:label="us-gaap_NetIncomeLoss"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Loss </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income Loss </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Comprehensive Loss </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Comprehensive Income Net Of Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:type="locator" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss per common share—basic and diluted </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share Basic And Diluted </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted average shares used in computing net loss per common share—basic and diluted </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Weighted Average Number Of Share Outstanding Basic And Diluted </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans" xlink:type="locator" xlink:label="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans"/>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period shares under employee and director stock option RSU and purchase plans. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans" xlink:to="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans" xlink:type="locator" xlink:label="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans"/>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period value under employee and director stock option RSU and purchase plans. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans" xlink:to="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_StockIssuedDuringPeriodSharesPublicOffering" xlink:type="locator" xlink:label="onvo_StockIssuedDuringPeriodSharesPublicOffering"/>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period shares public offering. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodSharesPublicOffering" xlink:to="onvo_StockIssuedDuringPeriodSharesPublicOffering_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_StockIssuedDuringPeriodValuePublicOffering" xlink:type="locator" xlink:label="onvo_StockIssuedDuringPeriodValuePublicOffering"/>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValuePublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period value public offering. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_StockIssuedDuringPeriodValuePublicOffering" xlink:to="onvo_StockIssuedDuringPeriodValuePublicOffering_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Stockholders Equity [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementEquityComponentsAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Components </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Equity Components [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:type="locator" xlink:label="us-gaap_EquityComponentDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Component </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Component [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:type="locator" xlink:label="us-gaap_CommonStockMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common Stock [Member] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional Paid-in Capital [Member] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid In Capital [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Deficit [Member] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Retained Earnings [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity Including Portion Attributable To Noncontrolling Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:type="locator" xlink:label="us-gaap_SharesOutstanding"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance, Shares </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Shares Outstanding </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock option exercises </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value Stock Options Exercised </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock option exercises, Shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Stock Options Exercised </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock under employee and director stock option, RSU, and purchase plans </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValueUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value Under Employee And Director Stock Option R S U And Purchase Plans </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock under employee and director stock option, RSU, and purchase plans, Shares </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesUnderEmployeeAndDirectorStockOptionRSUAndPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Under Employee And Director Stock Option R S U And Purchase Plans </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValuePublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock from public offering, net </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodValuePublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value Public Offering </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock from public offering, Shares </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_StockIssuedDuringPeriodSharesPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Public Offering </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation expense </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:type="locator" xlink:label="us-gaap_ProfitLoss"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Profit Loss </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance, Shares </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_IncreaseDecreaseInGrantsReceivable" xlink:type="locator" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable"/>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase decrease in grants receivable. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseDecreaseInGrantsReceivable" xlink:to="onvo_IncreaseDecreaseInGrantsReceivable_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_IncreaseDecreaseInDeferredRent" xlink:type="locator" xlink:label="onvo_IncreaseDecreaseInDeferredRent"/>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInDeferredRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase decrease in deferred rent. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseDecreaseInDeferredRent" xlink:to="onvo_IncreaseDecreaseInDeferredRent_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet" xlink:type="locator" xlink:label="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet"/>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase decrease in operating lease right of use asset and liabilities net. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet" xlink:to="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ProceedsFromIssuanceOfCommonStockAndWarrants" xlink:type="locator" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants"/>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Proceeds from issuance of common stock and warrants. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants" xlink:to="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ReceivableRelatedToFixedAssetSales" xlink:type="locator" xlink:label="onvo_ReceivableRelatedToFixedAssetSales"/>
<link:label xml:lang="en-US" xlink:label="onvo_ReceivableRelatedToFixedAssetSales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Receivable related to fixed asset sales. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ReceivableRelatedToFixedAssetSales" xlink:to="onvo_ReceivableRelatedToFixedAssetSales_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_TenantImprovementsFundedByLandlord" xlink:type="locator" xlink:label="onvo_TenantImprovementsFundedByLandlord"/>
<link:label xml:lang="en-US" xlink:label="onvo_TenantImprovementsFundedByLandlord_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Tenant improvements funded by landlord. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TenantImprovementsFundedByLandlord" xlink:to="onvo_TenantImprovementsFundedByLandlord_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_AssetsHeldForSale" xlink:type="locator" xlink:label="onvo_AssetsHeldForSale"/>
<link:label xml:lang="en-US" xlink:label="onvo_AssetsHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Assets held for sale. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AssetsHeldForSale" xlink:to="onvo_AssetsHeldForSale_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Cash Flows [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash Flows From Operating Activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Operating Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Adjustments to reconcile net loss to net cash used in operating activities: </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> (Gain) loss on disposal of fixed assets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Gain Loss On Sale Of Property Plant Equipment </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Gain on lease termination </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:type="locator" xlink:label="us-gaap_DepreciationDepletionAndAmortization"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Depreciation and amortization </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Depreciation Depletion And Amortization </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Allocated Share Based Compensation Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryWriteDown" xlink:type="locator" xlink:label="us-gaap_InventoryWriteDown"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InventoryWriteDown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inventory write-off </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWriteDown" xlink:to="us-gaap_InventoryWriteDown_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InventoryWriteDown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory Write Down </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increase (decrease) in cash resulting from changes in: </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Operating Capital [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Accounts receivable </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Accounts Receivable </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Grants receivable </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInGrantsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Grants Receivable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Inventory </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Inventories </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Prepaid expenses and other assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Prepaid Deferred Expense And Other Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Accounts Payable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued expenses </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Accrued Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred revenue </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Contract With Customer Liability </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInDeferredRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred rent </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInDeferredRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Deferred Rent </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Operating lease right-of-use assets and liabilities, net </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseDecreaseInOperatingLeaseRightOfUseAssetAndLiabilitiesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Operating Lease Right Of Use Asset And Liabilities Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash used in operating activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Operating Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash Flows From Investing Activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Investing Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Purchases of fixed assets </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments To Acquire Property Plant And Equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfProductiveAssets"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfProductiveAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from disposals of fixed assets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:to="us-gaap_ProceedsFromSaleOfProductiveAssets_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfProductiveAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Sale Of Productive Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash provided by (used in) investing activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Investing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash Flows From Financing Activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Financing Activities [Abstract] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of common stock and exercise of warrants, net </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromIssuanceOfCommonStockAndWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Common Stock And Warrants </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Employee taxes paid related to net share settlement of equity awards </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:to="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments Related To Tax Withholding For Share Based Compensation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from exercise of stock options </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="us-gaap_ProceedsFromStockOptionsExercised_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Stock Options Exercised </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash provided by financing activities </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Financing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net decrease in cash, cash equivalents, and restricted cash </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Cash, cash equivalents, and restricted cash at beginning of period </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Cash, cash equivalents, and restricted cash at end of period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Cash and cash equivalents </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Restricted cash </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:type="locator" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Supplemental Disclosure of Cash Flow Information: </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Supplemental Cash Flow Information [Abstract] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ReceivableRelatedToFixedAssetSales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Receivable related to fixed asset sales </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ReceivableRelatedToFixedAssetSales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Receivable Related To Fixed Asset Sales </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_TenantImprovementsFundedByLandlord_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Tenant improvements funded by landlord </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_TenantImprovementsFundedByLandlord_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Tenant Improvements Funded By Landlord </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AssetsHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Assets held for sale </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AssetsHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Held For Sale </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:type="locator" xlink:label="us-gaap_IncomeTaxesPaid"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income taxes paid </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Taxes Paid </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:type="locator" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Organization Consolidation And Presentation Of Financial Statements [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NatureOfOperations" xlink:type="locator" xlink:label="us-gaap_NatureOfOperations"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Description of Business </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NatureOfOperations" xlink:to="us-gaap_NatureOfOperations_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Nature Of Operations </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:type="locator" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Policies [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="locator" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Significant Accounting Policies </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Significant Accounting Policies [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:type="locator" xlink:label="us-gaap_EquityAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:type="locator" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders' Equity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:to="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Shareholders Equity And Share Based Payments [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CollaborativeArrangementDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_CollaborativeArrangementDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Research, Development, and License Agreements </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollaborativeArrangementDisclosureTextBlock" xlink:to="us-gaap_CollaborativeArrangementDisclosureTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Collaborative Arrangement Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments And Contingencies Disclosure [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_CommitmentsDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commitments and Contingencies </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsDisclosureTextBlock" xlink:to="us-gaap_CommitmentsDisclosureTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:type="locator" xlink:label="us-gaap_LeasesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Leases [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LeasesAbstract_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesOfLesseeDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_LeasesOfLesseeDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Leases </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeasesOfLesseeDisclosureTextBlock" xlink:to="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Leases Of Lessee Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RisksAndUncertaintiesAbstract" xlink:type="locator" xlink:label="us-gaap_RisksAndUncertaintiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RisksAndUncertaintiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Risks And Uncertainties [Abstract] </link:label>
<link: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"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Concentrations </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Concentration Risk Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transactions [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_RelatedPartyTransactionsAbstract_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Parties </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transactions Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring And Related Activities [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:to="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:to="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring And Related Activities Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:type="locator" xlink:label="us-gaap_SubsequentEventsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Events [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsAbstract_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:type="locator" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Events </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Events [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock" xlink:type="locator" xlink:label="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Basis of presentation and principles of consolidation. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock" xlink:to="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Basis of presentation and principles of consolidation </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Basis Of Presentation And Principles Of Consolidation Policy [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LiquidityPolicyTextBlock" xlink:type="locator" xlink:label="onvo_LiquidityPolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="onvo_LiquidityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Liquidity policy. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LiquidityPolicyTextBlock" xlink:to="onvo_LiquidityPolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_LiquidityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Liquidity </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LiquidityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liquidity Policy [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UseOfEstimates" xlink:type="locator" xlink:label="us-gaap_UseOfEstimates"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Use of estimates </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Use Of Estimates </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue recognition </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock" xlink:to="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue From Contract With Customer Policy [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfSalesPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_CostOfSalesPolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cost of revenues </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfSalesPolicyTextBlock" xlink:to="us-gaap_CostOfSalesPolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cost Of Sales Policy [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss per share </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share Policy [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Recent Accounting Pronouncements </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> New Accounting Pronouncements Policy Policy [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Stock By Class [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ScheduleOfStockByClassTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Stock By Class [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Award Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockUnitsRSUMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted stock units (RSUs) [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockUnitsRSUMember" xlink:to="us-gaap_RestrictedStockUnitsRSUMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Stock Units R S U [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_PerformanceBasedRestrictedStockUnitsMember" xlink:type="locator" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Performance based restricted stock units. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PerformanceBasedRestrictedStockUnitsMember" xlink:to="onvo_PerformanceBasedRestrictedStockUnitsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Performance-Based Restricted Stock Units [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Performance Based Restricted Stock Units [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:type="locator" xlink:label="us-gaap_ClassOfStockLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Class Of Stock [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfStockLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Class Of Stock [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Stock-based Compensation Expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value of Employee Stock Options </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value of Employee Stock Purchase Plan </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Payment Award Employee Stock Purchase Plan Valuation Assumptions Table [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Company's Restricted Stock Units Activity and Performance Based Restricted Stock Units Activity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Stock Option Activity </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Warrant Activity </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Stockholders Equity Note Warrants Or Rights [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock" xlink:type="locator" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Common stock capital shares reserved for future issuance. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock" xlink:to="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common Stock Reserved for Future Issuance </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalSharesReservedForFutureIssuanceTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Capital Shares Reserved For Future Issuance Table [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock" xlink:type="locator" xlink:label="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Schedule of balance sheet information related to leases. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock" xlink:to="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Impact of Adoption of ASC 842 on Consolidated Balance Sheet </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Balance Sheet Information Related To Leases Table [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" xlink:type="locator" xlink:label="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock"/>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Summary of supplemental cash flow information related to leases. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" xlink:to="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Cash Flows Associated with Company's Leases </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Summary Of Supplemental Cash Flow Information Related To Leases Table [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Restructuring Charges Recorded in Selling, General and Administrative Expenses </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:to="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Restructuring And Related Costs [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Activity and Balances of Restructuring Reserve </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:to="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Restructuring Reserve By Type Of Cost [Text Block] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NetCashBalanceOnUpwardAndDownwardAdjustment" xlink:type="locator" xlink:label="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment"/>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Net cash balance on upward and downward adjustment. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment" xlink:to="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NetCashBalanceAtClosingOfMerger" xlink:type="locator" xlink:label="onvo_NetCashBalanceAtClosingOfMerger"/>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceAtClosingOfMerger_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Net cash balance at closing of merger. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NetCashBalanceAtClosingOfMerger" xlink:to="onvo_NetCashBalanceAtClosingOfMerger_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement" xlink:type="locator" xlink:label="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement"/>
<link:label xml:lang="en-US" xlink:label="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Business acquisition date of amendment to merger agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement" xlink:to="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription" xlink:type="locator" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription"/>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Merger agreement upward and downward adjustment below description. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription" xlink:to="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription" xlink:type="locator" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription"/>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Merger agreement upward and downward adjustment above description. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription" xlink:to="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MergerAgreementDescription" xlink:type="locator" xlink:label="onvo_MergerAgreementDescription"/>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Merger agreement description. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerAgreementDescription" xlink:to="onvo_MergerAgreementDescription_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_DescriptionOfBusinessLineItems" xlink:type="locator" xlink:label="onvo_DescriptionOfBusinessLineItems"/>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Description of business. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DescriptionOfBusinessLineItems" xlink:to="onvo_DescriptionOfBusinessLineItems_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_DescriptionOfBusinessTable" xlink:type="locator" xlink:label="onvo_DescriptionOfBusinessTable"/>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Description of business. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DescriptionOfBusinessTable" xlink:to="onvo_DescriptionOfBusinessTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Description Of Business [Table] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Description Of Business [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipAxis" xlink:type="locator" xlink:label="srt_OwnershipAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_OwnershipAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Ownership </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipAxis" xlink:to="srt_OwnershipAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_OwnershipAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Ownership [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipDomain" xlink:type="locator" xlink:label="srt_OwnershipDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_OwnershipDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Ownership </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipDomain" xlink:to="srt_OwnershipDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_OwnershipDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Ownership [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_TarvedaTherapeuticsIncMember" xlink:type="locator" xlink:label="onvo_TarvedaTherapeuticsIncMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_TarvedaTherapeuticsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Tarveda Therapeutics, Inc. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TarvedaTherapeuticsIncMember" xlink:to="onvo_TarvedaTherapeuticsIncMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_TarvedaTherapeuticsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Tarveda Therapeutics, Inc [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_TarvedaTherapeuticsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Tarveda Therapeutics Inc [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:type="locator" xlink:label="us-gaap_TypeOfArrangementAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Arrangement and Arrangement Other than Collaborative </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Type Of Arrangement [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:type="locator" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Arrangement and Arrangement Other than Collaborative </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Arrangements And Nonarrangement Transactions [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MergerAgreementMember" xlink:type="locator" xlink:label="onvo_MergerAgreementMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Merger agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MergerAgreementMember" xlink:to="onvo_MergerAgreementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger Agreement [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Merger Agreement [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:type="locator" xlink:label="us-gaap_RestructuringCostAndReserveAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCostAndReserveAxis" xlink:to="us-gaap_RestructuringCostAndReserveAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Cost And Reserve [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:type="locator" xlink:label="us-gaap_TypeOfRestructuringDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Type of Restructuring </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfRestructuringDomain" xlink:to="us-gaap_TypeOfRestructuringDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Type Of Restructuring [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractTerminationMember" xlink:type="locator" xlink:label="us-gaap_ContractTerminationMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractTerminationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger Termination [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractTerminationMember" xlink:to="us-gaap_ContractTerminationMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractTerminationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract Termination [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Range [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember"/>
<link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Range [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember"/>
<link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Minimum [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Minimum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember"/>
<link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Maximum [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Maximum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event Type </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event Type </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event [Member] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Consolidated Entities </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Consolidated Entities [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Consolidated Entities </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ConsolidatedEntitiesDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Consolidated Entities [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_SamsaraSciencesIncMember" xlink:type="locator" xlink:label="onvo_SamsaraSciencesIncMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_SamsaraSciencesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Samsara Sciences, Inc. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_SamsaraSciencesIncMember" xlink:to="onvo_SamsaraSciencesIncMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_SamsaraSciencesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Samsara [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_SamsaraSciencesIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Samsara Sciences Inc [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CounterpartyNameAxis" xlink:type="locator" xlink:label="srt_CounterpartyNameAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Counterparty Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_CounterpartyNameAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Counterparty Name [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="locator" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Counterparty Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Repurchase Agreement Counterparty Name [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LifeNetHealthMember" xlink:type="locator" xlink:label="onvo_LifeNetHealthMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_LifeNetHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> LifeNet Health. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LifeNetHealthMember" xlink:to="onvo_LifeNetHealthMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_LifeNetHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> LifeNet Health [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LifeNetHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Life Net Health [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Description Of Business [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Description Of Business [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger agreement date </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1" xlink:to="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Business Acquisition Date Of Acquisition Agreement1 </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amendment to merger agreement date </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_BusinessAcquisitionDateOfAmendmentToMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Business Acquisition Date Of Amendment To Merger Agreement </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:type="locator" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of ownership on pro forma basis </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Method Investment Ownership Percentage </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:type="locator" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of ownership by company's security holders </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:to="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Minority Interest Ownership Percentage By Parent </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net cash balance on upward and downward adjustment </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceOnUpwardAndDownwardAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Balance On Upward And Downward Adjustment </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger agreement upward and downward adjustment below description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentBelowDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Merger Agreement Upward And Downward Adjustment Below Description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger agreement upward and downward adjustment above description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementUpwardAndDownwardAdjustmentAboveDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Merger Agreement Upward And Downward Adjustment Above Description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceAtClosingOfMerger_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net cash balance at closing of merger </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NetCashBalanceAtClosingOfMerger_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Balance At Closing Of Merger </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger agreement description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MergerAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Merger Agreement Description </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ReimbursementOfExpenses" xlink:type="locator" xlink:label="onvo_ReimbursementOfExpenses"/>
<link:label xml:lang="en-US" xlink:label="onvo_ReimbursementOfExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Reimbursement of expenses. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ReimbursementOfExpenses" xlink:to="onvo_ReimbursementOfExpenses_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossOnContractTermination" xlink:type="locator" xlink:label="us-gaap_LossOnContractTermination"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LossOnContractTermination_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Merger termination fee </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossOnContractTermination" xlink:to="us-gaap_LossOnContractTermination_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LossOnContractTermination_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Loss On Contract Termination </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ReimbursementOfExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Reimbursement of expenses </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ReimbursementOfExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Reimbursement Of Expenses </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_DateOfAgreement" xlink:type="locator" xlink:label="onvo_DateOfAgreement"/>
<link:label xml:lang="en-US" xlink:label="onvo_DateOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Date of agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DateOfAgreement" xlink:to="onvo_DateOfAgreement_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ProceedsFromSaleOfEquipmentAndInventory" xlink:type="locator" xlink:label="onvo_ProceedsFromSaleOfEquipmentAndInventory"/>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromSaleOfEquipmentAndInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Proceeds from sale of equipment and inventory. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ProceedsFromSaleOfEquipmentAndInventory" xlink:to="onvo_ProceedsFromSaleOfEquipmentAndInventory_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement" xlink:type="locator" xlink:label="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement"/>
<link:label xml:lang="en-US" xlink:label="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Amount credited to shareholders in connection with merger agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement" xlink:to="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NumberOfEmployeesNotTerminated" xlink:type="locator" xlink:label="onvo_NumberOfEmployeesNotTerminated"/>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfEmployeesNotTerminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of employees not terminated. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfEmployeesNotTerminated" xlink:to="onvo_NumberOfEmployeesNotTerminated_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_DateOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale agreement date </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DateOfAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Date Of Agreement </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromSaleOfEquipmentAndInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale of equipment and inventory in cash </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ProceedsFromSaleOfEquipmentAndInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Sale Of Equipment And Inventory </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amount credited to stockholders in connection with merger agreement </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AmountCreditedToShareholdersInConnectionWithMergerAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Amount Credited To Shareholders In Connection With Merger Agreement </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfEmployeesNotTerminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of general and administrative personnel not terminated </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfEmployeesNotTerminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Employees Not Terminated </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_SummaryOfSignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="onvo_SummaryOfSignificantAccountingPoliciesLineItems"/>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Summary of significant accounting policies. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_SummaryOfSignificantAccountingPoliciesLineItems" xlink:to="onvo_SummaryOfSignificantAccountingPoliciesLineItems_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable" xlink:type="locator" xlink:label="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable"/>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Schedule of summary of significant accounting policy. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable" xlink:to="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Summary Of Significant Accounting Policy [Table] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ScheduleOfSummaryOfSignificantAccountingPolicyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Summary Of Significant Accounting Policy [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale of Stock </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsidiary Sale Of Stock [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale of Stock </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sale Of Stock Name Of Transaction [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_AtTheMarketFacilityMember" xlink:type="locator" xlink:label="onvo_AtTheMarketFacilityMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_AtTheMarketFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> At-the-market facility. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AtTheMarketFacilityMember" xlink:to="onvo_AtTheMarketFacilityMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_AtTheMarketFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> At-The-Market Facility [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AtTheMarketFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> At The Market Facility [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_EmployeeSeveranceAndBenefitsCostsMember" xlink:type="locator" xlink:label="onvo_EmployeeSeveranceAndBenefitsCostsMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeSeveranceAndBenefitsCostsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Employee severance and benefits costs. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EmployeeSeveranceAndBenefitsCostsMember" xlink:to="onvo_EmployeeSeveranceAndBenefitsCostsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeSeveranceAndBenefitsCostsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee Severance and Benefits Costs [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeSeveranceAndBenefitsCostsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Severance And Benefits Costs [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis" xlink:type="locator" xlink:label="srt_StatementScenarioAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Scenario </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Scenario [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Scenario </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Scenario Unspecified [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember" xlink:type="locator" xlink:label="srt_ScenarioForecastMember"/>
<link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Scenario, Forecast [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Scenario Forecast [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:type="locator" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Category of Item Purchased </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:to="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Long Term Purchase Commitment By Category Of Item Purchased [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:type="locator" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Long-term Purchase Commitment, Category of Item Purchased </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:to="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Long Term Purchase Commitment Category Of Item Purchased [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementMember" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Services [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementMember" xlink:to="us-gaap_ResearchAndDevelopmentArrangementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Arrangement [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ExpirationAgreementMember" xlink:type="locator" xlink:label="onvo_ExpirationAgreementMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ExpirationAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Expiration agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ExpirationAgreementMember" xlink:to="onvo_ExpirationAgreementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ExpirationAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expiration Agreement [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ExpirationAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Expiration Agreement [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductMember" xlink:type="locator" xlink:label="us-gaap_ProductMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProductMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Product [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductMember" xlink:to="us-gaap_ProductMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProductMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Product [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Location </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement Location [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Location </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_IncomeStatementLocationDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement Location [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherIncomeMember" xlink:type="locator" xlink:label="us-gaap_OtherIncomeMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other Income [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIncomeMember" xlink:to="us-gaap_OtherIncomeMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Income [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Arrangement, Contract to Perform for Others, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Arrangement Contract To Perform For Others By Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Arrangement, Contract to Perform for Others, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Arrangement Contract To Perform For Others Type [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NationalInstituteOfHealthResearchGrantTwoMember" xlink:type="locator" xlink:label="onvo_NationalInstituteOfHealthResearchGrantTwoMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_NationalInstituteOfHealthResearchGrantTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> National Institute of Health research grant two. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NationalInstituteOfHealthResearchGrantTwoMember" xlink:to="onvo_NationalInstituteOfHealthResearchGrantTwoMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_NationalInstituteOfHealthResearchGrantTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> NIH Research Grants Two [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NationalInstituteOfHealthResearchGrantTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> National Institute Of Health Research Grant Two [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary Of Significant Accounting Policies [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Summary Of Significant Accounting Policies [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Cash and cash equivalents </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Restricted cash </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalents" xlink:to="us-gaap_RestrictedCashAndCashEquivalents_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash And Cash Equivalents </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel"> Cash flow from operations </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Issuance of common stock </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares New Issues </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Gross proceeds from sale of common stock shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated" xlink:type="locator" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of employees terminated </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated" xlink:to="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring And Related Cost Number Of Positions Eliminated </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent" xlink:type="locator" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of workforce terminated </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent" xlink:to="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring And Related Cost Number Of Positions Eliminated Period Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges" xlink:type="locator" xlink:label="us-gaap_RestructuringCharges"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring charges </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCharges" xlink:to="us-gaap_RestructuringCharges_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Charges </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:type="locator" xlink:label="us-gaap_PaymentsForRestructuring"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Payments for restructuring </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRestructuring" xlink:to="us-gaap_PaymentsForRestructuring_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments For Restructuring </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeveranceCosts1" xlink:type="locator" xlink:label="us-gaap_SeveranceCosts1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Severance and benefits costs </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeveranceCosts1" xlink:to="us-gaap_SeveranceCosts1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Severance Costs1 </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfEmployeesNotTerminated_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Number of general and administrative personnel </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Transaction related costs </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts" xlink:to="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Business Acquisition Cost Of Acquired Entity Transaction Costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Cash" xlink:type="locator" xlink:label="us-gaap_Cash"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Cash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash balance </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Cash" xlink:to="us-gaap_Cash_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_Cash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders’ equity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:type="locator" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impairment of long-lived assets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:to="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Impairment Of Long Lived Assets Held For Use </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Deferred revenue </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue recognized </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:to="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract With Customer Liability Revenue Recognized </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueNotFromContractWithCustomer" xlink:type="locator" xlink:label="us-gaap_RevenueNotFromContractWithCustomer"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueNotFromContractWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue related to expiration of an agreement </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueNotFromContractWithCustomer" xlink:to="us-gaap_RevenueNotFromContractWithCustomer_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueNotFromContractWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue Not From Contract With Customer </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ContractWithCustomerLiabilitySalesReturns" xlink:type="locator" xlink:label="onvo_ContractWithCustomerLiabilitySalesReturns"/>
<link:label xml:lang="en-US" xlink:label="onvo_ContractWithCustomerLiabilitySalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Contract with customer liability sales returns. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ContractWithCustomerLiabilitySalesReturns" xlink:to="onvo_ContractWithCustomerLiabilitySalesReturns_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ContractWithCustomerLiabilitySalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Product return revenue </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ContractWithCustomerLiabilitySalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract With Customer Liability Sales Returns </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfProductiveAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Sale of inventory and associated assets </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_GrantRevenueFundingPeriod" xlink:type="locator" xlink:label="onvo_GrantRevenueFundingPeriod"/>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueFundingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Grant revenue funding period. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_GrantRevenueFundingPeriod" xlink:to="onvo_GrantRevenueFundingPeriod_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ResearchGrant" xlink:type="locator" xlink:label="onvo_ResearchGrant"/>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Research grant. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ResearchGrant" xlink:to="onvo_ResearchGrant_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Revenue recognized under grants </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research Grant </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueFundingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Grant revenue funding period </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueFundingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Grant Revenue Funding Period </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel"> Revenue recognized under grants </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_GrantRevenueRemainingUnutilized" xlink:type="locator" xlink:label="onvo_GrantRevenueRemainingUnutilized"/>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueRemainingUnutilized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Grant revenue remaining unutilized. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_GrantRevenueRemainingUnutilized" xlink:to="onvo_GrantRevenueRemainingUnutilized_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueRemainingUnutilized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue unutilized remaining available balance </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_GrantRevenueRemainingUnutilized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Grant Revenue Remaining Unutilized </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfRevenue" xlink:type="locator" xlink:label="us-gaap_CostOfRevenue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cost of revenues </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cost Of Revenue </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DilutiveSecurities" xlink:type="locator" xlink:label="us-gaap_DilutiveSecurities"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DilutiveSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dilutive effect </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DilutiveSecurities" xlink:to="us-gaap_DilutiveSecurities_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DilutiveSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Dilutive Securities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock equivalents excluded from computing diluted net loss per share </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:type="locator" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and development </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Expense [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:type="locator" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> General and administrative </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> General And Administrative Expense [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Total stock-based compensation expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:type="locator" xlink:label="us-gaap_EmployeeStockOptionMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock options [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockOptionMember" xlink:to="us-gaap_EmployeeStockOptionMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Stock Option [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total unrecognized compensation cost related to unvested stock option grants </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total unrecognized compensation cost related, weighted average period </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Unrecognized stock-based compensation expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan" xlink:type="locator" xlink:label="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan"/>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of participants enrolled in employee stock purchase plan. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan" xlink:to="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Participants enrolled into the employee stock purchase plan </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfParticipantsEnrolledInEmployeeStockPurchasePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Participants Enrolled In Employee Stock Purchase Plan </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dividend yield </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Volatility </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Risk-free interest rate </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected life of options </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted average grant date fair value </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of options granted </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Plan Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Plan Name [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Plan Name </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Plan Name [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember" xlink:type="locator" xlink:label="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Employee stock purchase plan two thousand sixteen. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember" xlink:to="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> 2016 Employee Stock Purchase Plan [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_EmployeeStockPurchasePlanTwoThousandSixteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Stock Purchase Plan Two Thousand Sixteen [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share Based Compensation Arrangement By Share Based Payment Award [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Expected term </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Grant date fair value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesAuthorized"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Preferred stock, shares authorized </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Preferred Stock Shares Authorized </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesOutstanding"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Preferred stock, shares outstanding </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Preferred Stock Shares Outstanding </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_EquitySalesAgreementExpirationDate" xlink:type="locator" xlink:label="onvo_EquitySalesAgreementExpirationDate"/>
<link:label xml:lang="en-US" xlink:label="onvo_EquitySalesAgreementExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Equity sales agreement expiration date. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EquitySalesAgreementExpirationDate" xlink:to="onvo_EquitySalesAgreementExpirationDate_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale" xlink:type="locator" xlink:label="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale"/>
<link:label xml:lang="en-US" xlink:label="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Combination of securities authorized for offer and sale. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale" xlink:to="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IPOMember" xlink:type="locator" xlink:label="us-gaap_IPOMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> IPO [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IPOMember" xlink:to="us-gaap_IPOMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> I P O [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentsAxis" xlink:type="locator" xlink:label="us-gaap_OtherCommitmentsAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other Commitments </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsAxis" xlink:to="us-gaap_OtherCommitmentsAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Commitments [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentsDomain" xlink:type="locator" xlink:label="us-gaap_OtherCommitmentsDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other Commitments </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsDomain" xlink:to="us-gaap_OtherCommitmentsDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Commitments [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_TwoThousandEighteenSalesAgreementMember" xlink:type="locator" xlink:label="onvo_TwoThousandEighteenSalesAgreementMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_TwoThousandEighteenSalesAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> 2018 sales agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_TwoThousandEighteenSalesAgreementMember" xlink:to="onvo_TwoThousandEighteenSalesAgreementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_TwoThousandEighteenSalesAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> 2018 Sales Agreement [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_TwoThousandEighteenSalesAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Two Thousand Eighteen Sales Agreement [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_CertificateOfAmendmentMember" xlink:type="locator" xlink:label="onvo_CertificateOfAmendmentMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_CertificateOfAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Certificate of amendment. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CertificateOfAmendmentMember" xlink:to="onvo_CertificateOfAmendmentMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_CertificateOfAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Certificate of Amendment [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CertificateOfAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Certificate Of Amendment [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockConvertibleConversionPriceDecrease" xlink:type="locator" xlink:label="us-gaap_CommonStockConvertibleConversionPriceDecrease"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockConvertibleConversionPriceDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Minimum closing bid price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockConvertibleConversionPriceDecrease" xlink:to="us-gaap_CommonStockConvertibleConversionPriceDecrease_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockConvertibleConversionPriceDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Convertible Conversion Price Decrease </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_EquitySalesAgreementExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity sales agreement expiration date </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_EquitySalesAgreementExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Sales Agreement Expiration Date </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Securities authorized for offer and sale, amount </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CombinationOfSecuritiesAuthorizedForOfferAndSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Combination Of Securities Authorized For Offer And Sale </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_CommonStockCapitalValueReservedForFutureIssuance" xlink:type="locator" xlink:label="onvo_CommonStockCapitalValueReservedForFutureIssuance"/>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalValueReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Common stock capital value reserved for future issuance. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CommonStockCapitalValueReservedForFutureIssuance" xlink:to="onvo_CommonStockCapitalValueReservedForFutureIssuance_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalValueReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock value reserved for future issuance </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CommonStockCapitalValueReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Capital Value Reserved For Future Issuance </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock from stock options exercises, net, Shares </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Value of shares sold under equity distribution agreement </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value New Issues </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Issuance of common stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance, Unvested, Number of Shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Granted, Number of Shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Vested, Number of Shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Canceled / forfeited, Number of Shares </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures And Expirations </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance, Unvested, Number of Shares </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance, Unvested, Weighted Average Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Granted, Weighted Average Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vested, Weighted Average Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Canceled / forfeited, Weighted Average Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance, Unvested, Weighted Average Price </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NumberOfTranches" xlink:type="locator" xlink:label="onvo_NumberOfTranches"/>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranches_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of tranches. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfTranches" xlink:to="onvo_NumberOfTranches_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award award vesting year. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember" xlink:type="locator" xlink:label="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Inducement award performance-based restricted stock units. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember" xlink:to="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inducement Award Performance-Based Restricted Stock Units [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardPerformanceBasedRestrictedStockUnitsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Inducement Award Performance Based Restricted Stock Units [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis" xlink:type="locator" xlink:label="srt_TitleOfIndividualAxis"/>
<link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Title of Individual </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_TitleOfIndividualAxis" xlink:to="srt_TitleOfIndividualAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Title Of Individual [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:type="locator" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
<link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Title of Individual </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Title Of Individual With Relationship To Entity [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:type="locator" xlink:label="srt_ChiefExecutiveOfficerMember"/>
<link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> CEO [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ChiefExecutiveOfficerMember" xlink:to="srt_ChiefExecutiveOfficerMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Chief Executive Officer [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingAxis" xlink:type="locator" xlink:label="us-gaap_VestingAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vesting </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingAxis" xlink:to="us-gaap_VestingAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Vesting [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:type="locator" xlink:label="us-gaap_VestingDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vesting </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingDomain" xlink:to="us-gaap_VestingDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Vesting [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based Compensation Award, Tranche One [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Award Tranche One [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based Compensation Award, Tranche Two [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Award Tranche Two [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based Compensation Award, Tranche Three [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheThreeMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Award Tranche Three [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationAwardTrancheFourMember" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationAwardTrancheFourMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation award tranche four. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationAwardTrancheFourMember" xlink:to="onvo_ShareBasedCompensationAwardTrancheFourMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share Based Compensation Award Tranche Four [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Award Tranche Four [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationAwardTrancheFiveMember" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationAwardTrancheFiveMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation award tranche five. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationAwardTrancheFiveMember" xlink:to="onvo_ShareBasedCompensationAwardTrancheFiveMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share Based Compensation Award Tranche Five [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationAwardTrancheFiveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Award Tranche Five [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_FutureYearMember" xlink:type="locator" xlink:label="onvo_FutureYearMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_FutureYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Future year. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_FutureYearMember" xlink:to="onvo_FutureYearMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_FutureYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Future Year [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_FutureYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Future Year [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember" xlink:type="locator" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Performance based restricted stock Units retention awards. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember" xlink:to="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> PBRSU Retention Awards [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_PerformanceBasedRestrictedStockUnitsRetentionAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Performance Based Restricted Stock Units Retention Awards [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ManagementMember" xlink:type="locator" xlink:label="srt_ManagementMember"/>
<link:label xml:lang="en-US" xlink:label="srt_ManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Management Team [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ManagementMember" xlink:to="srt_ManagementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="srt_ManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Management [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of shares allocated </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranches_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of tranches </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranches_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Tranches </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award vesting percentage </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock units vesting year </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Year </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_NumberOfTranchesExpectedToVest" xlink:type="locator" xlink:label="onvo_NumberOfTranchesExpectedToVest"/>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranchesExpectedToVest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of tranches expected to vest. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_NumberOfTranchesExpectedToVest" xlink:to="onvo_NumberOfTranchesExpectedToVest_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Share based compensation arrangement, number of shares vested </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Share based compensation arrangement, number of shares forfeited </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Forfeitures </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Share based compensation arrangement, number of shares eligible to vest upon future performance </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share based compensation arrangement amendment description and terms </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Description And Terms </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranchesExpectedToVest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of tranches expected to vest </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_NumberOfTranchesExpectedToVest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Tranches Expected To Vest </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award equity instruments other than options grant date in period total fair value. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Grant date fair values of tranches </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateInPeriodTotalFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grant Date In Period Total Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Performance based restricted stock unit award vesting period </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Options Outstanding, Beginning balance </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Granted, Options Outstanding </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Cancelled / forfeited, Options Outstanding </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Exercised, Options Outstanding </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Options Outstanding, Ending balance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vested and Exercisable, Options Outstanding </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Weighted-Average Exercise Price, Options Beginning balance </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Options granted, Weighted-Average Exercise Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Options cancelled / forfeited, Weighted-Average Exercise Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Options exercised, Weighted-Average Exercise Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Weighted-Average Exercise Price, Options Ending balance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vested and Exercisable, Weighted-Average Exercise Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Aggregate Intrinsic Value, Options Beginning balance </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Options Exercised, Aggregate Intrinsic Value </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Aggregate Intrinsic Value, Options </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Vested and Exercisable, Aggregate Intrinsic Value </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted-average remaining contractual term of options exercisable </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted-average remaining contractual term of options outstanding </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award maximum amount per employee. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award purchase period. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod" xlink:type="locator" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod"/>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award initial offering period. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod" xlink:to="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="locator" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Number of common stock shares approved under ESPP </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Capital Shares Reserved For Future Issuance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee subscription rate </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Compensation amount per employee </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAmountPerEmployee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Maximum Amount Per Employee </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of shares per employee </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Per Employee </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair market value at discount </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Purchase period </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Purchase Period </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Initial offering period </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Initial Offering Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Description of plan </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Description </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shares available for purchase under ESPP </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financial Instrument </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Financial Instrument [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="locator" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financial Instruments </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WarrantMember" xlink:type="locator" xlink:label="us-gaap_WarrantMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_WarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Warrants [Member] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_WarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Warrant [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Cancelled, Options Outstanding </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Granted, Weighted-Average Exercise Price </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Exercised, Weighted-Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cancelled, Weighted-Average Exercise Price </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Warrants outstanding </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Class Of Warrant Or Right Outstanding </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_EquityIncentivePlanTwoThousandTwelveMember" xlink:type="locator" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Equity incentive plan two thousand twelve. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_EquityIncentivePlanTwoThousandTwelveMember" xlink:to="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Incentive Plan 2012 [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_EquityIncentivePlanTwoThousandTwelveMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Incentive Plan Two Thousand Twelve [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_InducementAwardAgreementMember" xlink:type="locator" xlink:label="onvo_InducementAwardAgreementMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Inducement award agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_InducementAwardAgreementMember" xlink:to="onvo_InducementAwardAgreementMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inducement Award Agreement [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_InducementAwardAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Inducement Award Agreement [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock reserved for future issuance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:to="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember" xlink:type="locator" xlink:label="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> December two thousand sixteen non exclusive research affiliation collaborative. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember" xlink:to="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> December 2016 Non-exclusive Research Affiliation Collaborative [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DecemberTwoThousandSixteenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> December Two Thousand Sixteen Non Exclusive Research Affiliation Collaborative [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LicenseMember" xlink:type="locator" xlink:label="us-gaap_LicenseMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LicenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> License [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LicenseMember" xlink:to="us-gaap_LicenseMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LicenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> License [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember" xlink:type="locator" xlink:label="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> April two thousand seventeen non exclusive research affiliation collaborative. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember" xlink:to="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> April 2017 Non-exclusive Research Affiliation Collaborative [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_AprilTwoThousandSeventeenNonExclusiveResearchAffiliationCollaborativeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> April Two Thousand Seventeen Non Exclusive Research Affiliation Collaborative [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contract with Customer, Basis of Pricing </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerBasisOfPricingAxis" xlink:to="us-gaap_ContractWithCustomerBasisOfPricingAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract With Customer Basis Of Pricing [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contract with Customer, Basis of Pricing </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerBasisOfPricingDomain" xlink:to="us-gaap_ContractWithCustomerBasisOfPricingDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerBasisOfPricingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Contract With Customer Basis Of Pricing [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeAndMaterialsContractMember" xlink:type="locator" xlink:label="us-gaap_TimeAndMaterialsContractMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TimeAndMaterialsContractMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Up-front Payment Received [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeAndMaterialsContractMember" xlink:to="us-gaap_TimeAndMaterialsContractMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TimeAndMaterialsContractMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Time And Materials Contract [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:type="locator" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Arrangements and Noncollaborative Arrangement Transactions [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_PatentLicenseAgreementDuration" xlink:type="locator" xlink:label="onvo_PatentLicenseAgreementDuration"/>
<link:label xml:lang="en-US" xlink:label="onvo_PatentLicenseAgreementDuration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Patent license agreement duration. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PatentLicenseAgreementDuration" xlink:to="onvo_PatentLicenseAgreementDuration_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Non-exclusive patent license agreement annual fee </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_PatentLicenseAgreementDuration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Non-exclusive patent license agreement term </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_PatentLicenseAgreementDuration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Patent License Agreement Duration </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromLicenseFeesReceived" xlink:type="locator" xlink:label="us-gaap_ProceedsFromLicenseFeesReceived"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromLicenseFeesReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from Non-exclusive patent annual license fee </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLicenseFeesReceived" xlink:to="us-gaap_ProceedsFromLicenseFeesReceived_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromLicenseFeesReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From License Fees Received </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OperatingLeaseLineItems" xlink:type="locator" xlink:label="onvo_OperatingLeaseLineItems"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Operating lease. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OperatingLeaseLineItems" xlink:to="onvo_OperatingLeaseLineItems_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OperatingLeaseTable" xlink:type="locator" xlink:label="onvo_OperatingLeaseTable"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Operating lease disclosure. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OperatingLeaseTable" xlink:to="onvo_OperatingLeaseTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating Lease [Table] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseArrangementTypeAxis" xlink:type="locator" xlink:label="us-gaap_LeaseArrangementTypeAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseArrangementTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease Arrangement, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseArrangementTypeAxis" xlink:to="us-gaap_LeaseArrangementTypeAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseArrangementTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Arrangement Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:type="locator" xlink:label="us-gaap_LeaseArrangementTypeDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseArrangementTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease Arrangement, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseArrangementTypeDomain" xlink:to="us-gaap_LeaseArrangementTypeDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseArrangementTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Arrangement Type [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LeaseTermForRemainderOfRentableSquareFootageMember" xlink:type="locator" xlink:label="onvo_LeaseTermForRemainderOfRentableSquareFootageMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForRemainderOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Lease term for remainder of rentable square footage. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LeaseTermForRemainderOfRentableSquareFootageMember" xlink:to="onvo_LeaseTermForRemainderOfRentableSquareFootageMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForRemainderOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease Term For Remainder of Total Rentable Square Footage [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForRemainderOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Term For Remainder Of Rentable Square Footage [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember" xlink:type="locator" xlink:label="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Lease term for fourteen thousand six hundred and eighty five of rentable square footage. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember" xlink:to="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease Term For 14,685 of Total Rentable Square Footage [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseTermForFourteenThousandSixHundredAndEightyFiveOfRentableSquareFootageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Term For Fourteen Thousand Six Hundred And Eighty Five Of Rentable Square Footage [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Property, Plant and Equipment, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Property Plant And Equipment By Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Property, Plant and Equipment, Type </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Property Plant And Equipment Type [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MainFacilitiesMember" xlink:type="locator" xlink:label="onvo_MainFacilitiesMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_MainFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Main facilities. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MainFacilitiesMember" xlink:to="onvo_MainFacilitiesMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_MainFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Main Facilities [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MainFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Main Facilities [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating Lease [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Operating right-of-use assets </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Right Of Use Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiability"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating lease liability </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Liability </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRentCredit" xlink:type="locator" xlink:label="us-gaap_DeferredRentCredit"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred rent </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRentCredit" xlink:to="us-gaap_DeferredRentCredit_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRentCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Rent Credit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:type="locator" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Initial Application Period Cumulative Effect Transition </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:to="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Initial Application Period Cumulative Effect Transition [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:type="locator" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Initial Application Period Cumulative Effect Transition </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:to="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Initial Application Period Cumulative Effect Transition [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member" xlink:type="locator" xlink:label="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member"/>
<link:label xml:lang="en-US" xlink:label="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Difference between lease guidance in effect before and after Topic 842. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member" xlink:to="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impact of Adoption [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_DifferenceBetweenLeaseGuidanceInEffectBeforeAndAfterTopic842Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Difference Between Lease Guidance In Effect Before And After Topic842 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="locator" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Adjustments for New Accounting Pronouncements </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:to="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments For New Accounting Pronouncements [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:type="locator" xlink:label="us-gaap_TypeOfAdoptionMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Type of Adoption </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfAdoptionMember" xlink:to="us-gaap_TypeOfAdoptionMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Type Of Adoption [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201602Member"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> ASC 842 [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201602Member" xlink:to="us-gaap_AccountingStandardsUpdate201602Member_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update201602 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidRent" xlink:type="locator" xlink:label="us-gaap_PrepaidRent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Prepaid Rent </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidRent" xlink:to="us-gaap_PrepaidRent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidRent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Prepaid Rent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Operating lease liability </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Liability Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating lease liability, net of current portion </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Liability Noncurrent </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OfficeSpaceAreaUnderLeaseAgreement" xlink:type="locator" xlink:label="onvo_OfficeSpaceAreaUnderLeaseAgreement"/>
<link:label xml:lang="en-US" xlink:label="onvo_OfficeSpaceAreaUnderLeaseAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Office space area under lease agreement. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OfficeSpaceAreaUnderLeaseAgreement" xlink:to="onvo_OfficeSpaceAreaUnderLeaseAgreement_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OperatingLeasesMonthlyRentExpense" xlink:type="locator" xlink:label="onvo_OperatingLeasesMonthlyRentExpense"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeasesMonthlyRentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Operating leases monthly rent expense. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OperatingLeasesMonthlyRentExpense" xlink:to="onvo_OperatingLeasesMonthlyRentExpense_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LandlordFundedTenantImprovements" xlink:type="locator" xlink:label="onvo_LandlordFundedTenantImprovements"/>
<link:label xml:lang="en-US" xlink:label="onvo_LandlordFundedTenantImprovements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Landlord funded tenant improvements. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LandlordFundedTenantImprovements" xlink:to="onvo_LandlordFundedTenantImprovements_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_LeaseOptionTerminationDescription" xlink:type="locator" xlink:label="onvo_LeaseOptionTerminationDescription"/>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseOptionTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Lease option termination description. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_LeaseOptionTerminationDescription" xlink:to="onvo_LeaseOptionTerminationDescription_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OperatingLeaseRightOfUseAssetWriteOff" xlink:type="locator" xlink:label="onvo_OperatingLeaseRightOfUseAssetWriteOff"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseRightOfUseAssetWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Operating lease right of use asset write off. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OperatingLeaseRightOfUseAssetWriteOff" xlink:to="onvo_OperatingLeaseRightOfUseAssetWriteOff_lbl"/>
<link:loc xlink:href="onvo-20191231.xsd#onvo_OperatingLeaseLiabilityWriteOff" xlink:type="locator" xlink:label="onvo_OperatingLeaseLiabilityWriteOff"/>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLiabilityWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Operating lease liability write off. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_OperatingLeaseLiabilityWriteOff" xlink:to="onvo_OperatingLeaseLiabilityWriteOff_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_OfficeSpaceAreaUnderLeaseAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Office space under lease agreement </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OfficeSpaceAreaUnderLeaseAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Office Space Area Under Lease Agreement </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeasesMonthlyRentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Monthly rental payments </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeasesMonthlyRentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Leases Monthly Rent Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Base rent escalators </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate" xlink:to="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Leases Of Lessee Contingent Rentals Basis Spread On Variable Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseExpirationDate1" xlink:type="locator" xlink:label="us-gaap_LeaseExpirationDate1"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease expiration date </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseExpirationDate1" xlink:to="us-gaap_LeaseExpirationDate1_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Expiration Date1 </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LandlordFundedTenantImprovements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Landlord tenant improvements funded amount </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LandlordFundedTenantImprovements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Landlord Funded Tenant Improvements </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseOptionTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease option termination description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_LeaseOptionTerminationDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease Option Termination Description </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseRightOfUseAssetWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Right-of-use asset write-off </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseRightOfUseAssetWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Right Of Use Asset Write Off </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLiabilityWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease liabilities write-off </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_OperatingLeaseLiabilityWriteOff_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Liability Write Off </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Lease term </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseTermOfContract" xlink:to="us-gaap_LesseeOperatingLeaseTermOfContract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lessee Operating Lease Term Of Contract </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_MonthlyRentPayments" xlink:type="locator" xlink:label="onvo_MonthlyRentPayments"/>
<link:label xml:lang="en-US" xlink:label="onvo_MonthlyRentPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Monthly rent payments. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_MonthlyRentPayments" xlink:to="onvo_MonthlyRentPayments_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_MonthlyRentPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Monthly rental payments </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_MonthlyRentPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Monthly Rent Payments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseCost"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating lease expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:type="locator" xlink:label="us-gaap_LeaseAndRentalExpense"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Rent expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseAndRentalExpense" xlink:to="us-gaap_LeaseAndRentalExpense_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease And Rental Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableLeaseCost" xlink:type="locator" xlink:label="us-gaap_VariableLeaseCost"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Variable lease expense </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableLeaseCost" xlink:to="us-gaap_VariableLeaseCost_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Variable Lease Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:type="locator" xlink:label="us-gaap_ShortTermLeaseCost"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Short term lease cost </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermLeaseCost" xlink:to="us-gaap_ShortTermLeaseCost_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Short Term Lease Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:type="locator" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash paid for amount included in measurement of liabilities: </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:to="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Flow Operating Activities Lessee [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:type="locator" xlink:label="us-gaap_OperatingLeasePayments"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating cash flows from operating leases </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease Payments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Related Party Transactions By Related Party [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Related Party Transactions By Related Party [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Party </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transactions By Related Party [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDomain"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Party </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_CiriusTherapeuticsIncorporationMember" xlink:type="locator" xlink:label="onvo_CiriusTherapeuticsIncorporationMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_CiriusTherapeuticsIncorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Cirius Therapeutics Incorporation. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_CiriusTherapeuticsIncorporationMember" xlink:to="onvo_CiriusTherapeuticsIncorporationMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_CiriusTherapeuticsIncorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cirius Therapeutics, Inc., [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_CiriusTherapeuticsIncorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cirius Therapeutics Incorporation [Member] </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis"/>
<link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Legal Entity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Legal Entity [Axis] </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityDomain" xlink:to="dei_EntityDomain_lbl"/>
<link:label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity [Domain] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ResearchServicesMember" xlink:type="locator" xlink:label="onvo_ResearchServicesMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Research services. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ResearchServicesMember" xlink:to="onvo_ResearchServicesMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research Services [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ResearchServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research Services [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_ViscientBiosciencesMember" xlink:type="locator" xlink:label="onvo_ViscientBiosciencesMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_ViscientBiosciencesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Viscient Biosciences. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_ViscientBiosciencesMember" xlink:to="onvo_ViscientBiosciencesMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_ViscientBiosciencesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Viscient Biosciences [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_ViscientBiosciencesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Viscient Biosciences [Member] </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_PrimaryHumanCellBasedProductsMember" xlink:type="locator" xlink:label="onvo_PrimaryHumanCellBasedProductsMember"/>
<link:label xml:lang="en-US" xlink:label="onvo_PrimaryHumanCellBasedProductsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Primary human cell-based products. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_PrimaryHumanCellBasedProductsMember" xlink:to="onvo_PrimaryHumanCellBasedProductsMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="onvo_PrimaryHumanCellBasedProductsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Primary Human Cell-based Products [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_PrimaryHumanCellBasedProductsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Primary Human Cell Based Products [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Party Transaction [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transaction [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amount of transactions with related party for providing services </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transaction Amounts Of Transaction </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:type="locator" xlink:label="us-gaap_RevenueFromRelatedParties"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue recognized from related parties agreement </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromRelatedParties" xlink:to="us-gaap_RevenueFromRelatedParties_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue From Related Parties </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfProductiveAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel"> Sale of productive assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherIncome" xlink:type="locator" xlink:label="us-gaap_OtherIncome"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Other income </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIncome" xlink:to="us-gaap_OtherIncome_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_OtherIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Income </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Restructuring And Related Costs [Table] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:to="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Restructuring And Related Costs [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:type="locator" xlink:label="us-gaap_RestructuringCostAndReserveLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring Cost And Reserve [Line Items] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCostAndReserveLineItems" xlink:to="us-gaap_RestructuringCostAndReserveLineItems_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Cost And Reserve [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="locator" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Selling, General and Administrative Expenses [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Selling General And Administrative Expenses [Member] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Severance for Involuntary Employee Terminations </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Restructuring Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:type="locator" xlink:label="us-gaap_EmployeeSeveranceMember"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Severance for Involuntary Employee Terminations [Member] </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeSeveranceMember" xlink:to="us-gaap_EmployeeSeveranceMember_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Severance [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserve" xlink:type="locator" xlink:label="us-gaap_RestructuringReserve"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Balance at March 31, 2019 </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringReserve" xlink:to="us-gaap_RestructuringReserve_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Reserve </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Reserve established </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInRestructuringReserve" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInRestructuringReserve"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInRestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increase to reserve </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInRestructuringReserve" xlink:to="us-gaap_IncreaseDecreaseInRestructuringReserve_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInRestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Restructuring Reserve </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserveAbstract" xlink:type="locator" xlink:label="us-gaap_RestructuringReserveAbstract"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserveAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Utilization of reserve: </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringReserveAbstract" xlink:to="us-gaap_RestructuringReserveAbstract_lbl"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserveAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Reserve [Abstract] </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel"> Payments </link:label>
<link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Balance at December 31, 2019 </link:label>
<link:loc xlink:href="onvo-20191231.xsd#onvo_IncreaseInValuationForValueAttributableToIntellectualProperty" xlink:type="locator" xlink:label="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty"/>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase in valuation for value attributable to company’s intellectual property. </link:label>
<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty" xlink:to="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty_lbl"/>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTable" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTable"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event [Table] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:type="locator" xlink:label="us-gaap_SubsequentEventLineItems"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event [Line Items] </link:label>
<link: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"/>
<link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event [Line Items] </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Increase in valuation for value attributable to company’s intellectual property </link:label>
<link:label xml:lang="en-US" xlink:label="onvo_IncreaseInValuationForValueAttributableToIntellectualProperty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase In Valuation For Value Attributable To Intellectual Property </link:label>
</link:labelLink>
</link:linkbase>

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