1 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts. Electronic address: eminis@mgh.harvard.edu.
2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts.
3 Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts.
4 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts; Harvard T.H. Chan School of Public Health, Boston, Massachusetts.