1 Fertility and Reproductive Health, Lucille Packard Children's Hospital, Sunnyvale, California and Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California.
2 Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia.
3 Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.