1. Institute of Reproductive Health/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
2. Wuhan Tongji Reproductive Medicine Hospital, Wuhan 430013, China
3. National Health and Family Planning Key Laboratory of Male Reproductive Health, National Research Institute for Family Planning, Beijing 10081, China
4. Department of Andrology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, China
5. School of Public Health, Zunyi Medical University, Zunyi 563006, China
6. Guangzhou Women and Children’s Medical Center, Guangzhou 510180, China
7. Technical Guidance Institute of Shanxi Province Family Planning Commission, Xi’an 710000, China
8. Reproductive Medicine Centre, Peking University International Hospital, Beijing 102206, China
9. People’s Hospital of Jinhu, Jinhu 211600, China
10. School of Public Health, Guangdong Medical University, Guangzhou 524023, China
11. Reproductive Medical Centre, Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China