1. Department of Obstetrics and Gynecology Affiliated Hospital 2 of Nantong University and First People's Hospital of Nantong City Nantong Jiangsu China
2. Department of Human Anatomy, School of Medicine Nantong University Nantong China
3. Suzhou Dushu Lake Hospital (Dushu Lake Hospital Affiliated to Soochow University) Suzhou China
4. Institute of Reproductive Medicine, School of Medicine Nantong University Nantong China
5. State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University Suzhou China
6. Department of Gynaecology, Suzhou Municipal Hospital The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University Suzhou China