13G Filing: EcoR1 Capital and Ovascience Inc. (NASDAQ:OVAS)

Page 4 of 7 – SEC Filing

1. Names of Reporting Persons.

EcoR1 Capital Fund Qualified, L.P.

2. Check the Appropriate Box if
a Member of a Group (See Instructions)

(a) ______

(b) ______

3. SEC Use Only

4. Citizenship or Place of Organization
Delaware

Number of

Shares

Beneficially

Owned by

Each Reporting

Person With:

5. Sole Voting Power -0-

6. Shared Voting Power 2,685,528
7. Sole Dispositive Power -0-
8. Shared Dispositive Power 2,685,528

9. Aggregate Amount Beneficially
Owned by Each Reporting Person 2,685,528

10. Check if the Aggregate Amount
in Row (9) Excludes Certain Shares (See
Instructions) ______

11. Percent of Class Represented
by Amount in Row (9) 7.5%

12. Type of Reporting Person (See
Instructions) PN

4

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