作者单位:McGill University Faculty of Medicine[1]Division of Reproductive Endocrinology and Infertility Department of Obstetrics and Gynecology[2]Department of Obstetrics and Gynecology King Abdulaziz University[3]Department of Obstetrics and Gynecology King Fahad Medical City[4]Department of Obstetrics and Gynecology University of Tabuk[5]