1. Center of Assisted Reproduction, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
2. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
3. Department of Obstetrics, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
4. Department of Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China