Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, China;
Key Laboratory of Assisted Reproduction, Ministry of Education,Beijing 100191, China;
Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, China;
Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, China;
Key Laboratory of Assisted Reproduction, Ministry of Education,Beijing 100191, China;
Department of Obstetrics and Gynecology , Peking University People's Hospital, Beijing 100044, China;
Department of Obstetrics and Gynecology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China;
Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, China;
Reproductive Medical Center, Peking University People's Hospital, Beijing 100044, China;