1 Department of Obstetrics and Gynecology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.
2 Guangzhou Medical University, Guangzhou, Guangdong, China.
3 Department of Obstetrics and Gynecology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China. Electronic address: dabaoxu2022@163.com.