1. Family Planning Research Institute, Tongji Medical CollegeHuazhong University of Science and Technology Wuhan Hubei China
2. Department of Gynecology, The First Affiliated Hospital of Zhengzhou University Zhengzhou Henan China
3. Department of Reproduction and GeneticsThe First Affiliated Hospital of Kunming Medical University Kunming Yunnan Province China
4. Reproductive Medicine CenterTongji Medical College, Huazhong University of Science and Technology Wuhan Hubei China