1. Center for Reproductive Medicine, Department of Obstetrics and Gynecology Affiliated Hospital of North Sichuan Medical College Nanchong People's Republic of China
2. Department of Obstetrics and Gynecology Affiliated Hospital of North Sichuan Medical College Nanchong People's Republic of China
3. Department of Clinical Laboratory Affiliated Hospital of North Sichuan Medical College Nanchong People's Republic of China
4. Department of Pediatrics Nanchong Center Hospital Nanchong People's Republic of China
5. Department of Obstetrics and Gynecology Second Affiliated Hospital, Chongqing Medical University Chongqing China