1. Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
2. Beijing
Key Laboratory of Reproductive Endocrinology and Assisted Reproductive
Technology, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
3. Key
Laboratory of Assisted Reproduction, Ministry of Education, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
4. Laboratory
of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, No. 140 Hanzhong Road, Gulou District, Nanjing 210029, China
5. State
Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, No. 1 Beichen Xi Road, Chaoyang District, Beijing 100101, China