Affiliation: | 1.Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, GA, USA ;2.Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA ;3.Division of Reproductive Endocrinology and Infertility, Vanderbilt University School of Medicine, Nashville, TN, USA ;4.National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA ; |