1. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Barnes-Jewish Hospital, Washington University School of Medicine, St. Louis, Missouri.
2. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
3. Connors Center for Women's Health and Gender Biology, Division of Women's Health, Brigham and Women's Hospital, Boston, Massachusetts.
4. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Brigham and Women's Hospital, Boston, Massachusetts.
5. Department of Medicine, Division of Endocrinology, Brigham and Women's Hospital, Boston, Massachusetts.