Affiliation: | a Reproductive Biology and Medicine Branch, National Institute of Child Health and Human Development, National Institute of Health, Bethesda, Maryland b Combined Federal Fellowship in Reproductive Endocrinology, Bethesda, Maryland c Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland d Genetics and IVF Institute, Fairfax, Virginia e Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland f Karolinska Institute, Huddinge, Sweden |