1. Department of Obstetrics and Gynecology (Q.X.), First Hospital of Peking University, Beijing, People’s Republic of China
2. Divisions of Reproductive Biology Research (Q.X., Z.L., P.Y., Y.-H.C., S.R., S.E.B.), Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
3. Reproductive Endocrinology and Infertility (M.P.M., E.C., S.E.B.), Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611