1. Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China
2. The First Affiliated Hospital of Anhui Medical University , Hefei, China
3. Hospital for Reproductive Medicine Affiliated to Shandong University , Jinan, China
4. Beijing Anzhen Hospital, Capital Medical University , Beijing, China
5. Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing, China
6. Obstetrics & Gynecology Hospital of Fudan University , Shanghai, China
7. Peking University Health Science Center , Beijing, China
8. Reproductive & Genetic Hospital of CITIC-Xiangya , Changsha, China
9. Peking University First Hospital , Beijing, China
10. The First Affiliated Hospital of Chongqing Medical University , Chongqing, China
11. Peking University Shenzhen Hospital , Shenzhen, China
12. Renji Hospital Affiliated to Shanghai Jiaotong University School of Medicine , Shanghai, China
13. The State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University , Changsha, China
14. Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital , Shenzhen, China
15. Maternity and Child Health Care of Guangxi Zhuang Autonomous Region , Nanning, China
16. Henan Provincial Peoples Hospital , Zhengzhou, China
17. Hospital Affiliated to Guizhou Medical University , Guiyang, China
18. The First Affiliated Hospital, Sun Yat-sen Univeristy , Guangzhou, China
19. Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences , Beijing, China