1. Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China.
2. National Clinical Research Center for Obstetrics and Gynecology, Beijing 100191, China.
3. Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing 100191, China.
4. Beijing Advanced Innovation Center for Genomics, Beijing 100871, China.
5. Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.