1. Dushu Lake Hospital Affiliated to Soochow University, Center for Reproduction, Suzhou Dushu Lake Hospital, Suzhou, Jiangsu, China
2. The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Center for Reproduction, Huai’an, Jiang Su, China
3. Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, State Key Laboratory of Reproductive Medicine, Nanjing, Jiangsu, China
4. State Key Laboratory of Reproductive Medicine and Offspring Health, The Affiliated Taizhou People’s Hospital of Nanjing Medical University, Taizhou School of Clinical Medicine, Nanjing Medical University, Jiangsu, China
5. The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, Suzhou, Jiangsu, China