1 Department of Gynecology and Obstetrics Key Laboratory of the Ministry of Education Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China.
2 Department of Gynecology and Obstetrics Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China.
3 Center for Reproductive Medicine Department of Obstetrics and Gynecology Peking University Third Hospital Beijing China.