1. Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R.China;
2. Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, P.R.China;
3. Department of Endocrinology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China;
4. Department of Biobank, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China