1. Department of Obstetrics and Gynecology, Shanxi Medical University, Taiyuan 030000, Shanxi Province, China
2. Department of Obstetrics and Gynecology, Children's Hospital of Shanxi and Women Health Center of Shanxi, Taiyuan 030000, China
3. Laboratory Animal Center of Shanxi Medical University, Shanxi Medical University, Taiyuan 030000, Shanxi Province, China
4. Department of Gynecology, First Hospital of Shanxi Medical University, Taiyuan 030000, Shanxi Province, China