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 (Peking University Third Hospital), Beijing, 100191, China.
3 Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, 100191, China.
4 Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China.
5 Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China. bysylp@sina.com.
6 National Clinical Research Center for Obstetrics and Gynecology (Peking University Third Hospital), Beijing, 100191, China. bysylp@sina.com.
7 Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing, 100191, China. bysylp@sina.com.
8 Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, 100191, China. bysylp@sina.com.