100
Participants
Start Date
January 31, 2012
Primary Completion Date
July 31, 2013
Study Completion Date
August 31, 2013
letrozole
letrozole from the day of oocyte retrieval for 5 days
Aspirin
aspirin from the day of oocyte retrieval for 5 days
First Affiliated Hospital, Sun Yat-Sen University
OTHER