1. Reproductive Medicine Center, Huanggang Central Hospital of Yangtze University, Huanggang, Hubei 438000, China
2. Obstetrics and Gynecology Department, Tuanfeng Maternal and Child Health Hospital, Huanggang, Hubei 438000, China
3. Obstetrics and Gynecology Department, Huanggang Central Hospital of Yangtze University, Huanggang, Hubei 438000, China