Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China;
Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China;
Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China;
Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China;
Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China;
Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing 100191, China;
Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China;
Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China;
Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China;
Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing 100191, China;