1. Reproductive Endocrine Unit (N.D.S., S.S.S., C.K.W., K.H.C., J.M.A., P.M.S., J.E.H.), Department of Medicine, Massachusetts General Hospital, Boston Massachusetts 02114
2. Division of Endocrinology (N.D.S.), Children's Hospital Boston
3. Center for Infertility and Reproductive Surgery (S.S.S., J.H.F.), Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts 02115