UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No.     )

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OvaScience, Inc.
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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting to Be Held on June 8, 2017. OVASCIENCE, INC. You are receiving this communication because you hold shares in the company named above. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of OVASCIENCE, INC. 9 4TH AVENUE WALTHAM, MA 02451 ATTN: CHRISTOPHE COUTURIER the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. proxy materials and voting instructions. E26345-P92015 See the reverse side of this notice to obtain Meeting Information Meeting Type:Annual Meeting For holders as of:April 10, 2017 Date: June 8, 2017Time: 11:00 a.m., Eastern Time Location: The Westin Waltham Boston 70 3rd Avenue Waltham, Massachusetts 02451

Before You Vote How to Access the Proxy Materials Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the by the arrow XXXX XXXX XXXX XXXX (located on the following page) in the subject line. How To Vote Please Choose One of the Following Voting Methods marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions. E26346-P92015 Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card. Proxy Materials AAvvaaiillaabbllee ttooVVIEIEWWoorrRREECCEEIVIVEE: : NOTICEPROXY STATEMENTANNUAL REPORT How to View Online: following page) and visit: www.proxyvote .com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 1) BY INTERNET:www.proxyvote.com 2) BY TELEPHONE: 1-800-579-1639 3) BY E-MAIL*:sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 25, 2017 to facilitate timely delivery.

The Board of Directors recommends you vote FOR each of the Class II Director nominees: 1. Election of Class II Directors Nominees: 01) Richard Aldrich 02) Mary Fisher 03) John Sexton, Ph.D. The Board of Directors recommends you vote FOR proposal 2. 2. To ratify the appointment of Ernst & Young LLP, an independent registered public accounting firm, as the independent auditors of OvaScience for the fiscal year ending December 31, 2017. The Board of Directors recommends you vote FOR proposal 3. 3. Proposal to approve, on an advisory basis, the compensation of the Company's named executive officers, as disclosed pursuant to the compensation disclosure rules of the Securities and Exchange Commission. E26347-P92015 Voting Items

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