1 Department of Postgraduate Education (Drs. Han and Wang), Bengbu Medical College, Bengbu, Anhui Province, China; Reproductive Medicine Center (Drs. Han, Liu, and Wang), Department of Gynecology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang Province, China.
2 Department of Gynecology (Dr. Zhu), Zhejiang Provincial People's Hospital Tongxiang Branch, Jiaxing, Zhejiang Province, China.
3 Department of Postgraduate Education (Drs. Han and Wang), Bengbu Medical College, Bengbu, Anhui Province, China; Reproductive Medicine Center (Drs. Han, Liu, and Wang), Department of Gynecology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang Province, China. Electronic address: wangyanpeng@hmc.edu.cn.