[Liu, Wenhui; Zhang, Yuanzhen; Wang, Yan] Wuhan Univ, Zhongnan Hosp, Ctr Reprod Med, Wuhan 430071, Hubei, Peoples R China.
[Liu, Wenpei] Univ South China, Peoples Hosp Chenzhou 1, Translat Med Inst, Chenzhou 423000, Hunan, Peoples R China.
[Fu, Yuling] Second Hosp Yinzhou, Dept Obstet & Gynecol, Ningbo 315000, Zhejiang, Peoples R China.
[Zhang, Yuanzhen] Wuhan Univ, Zhongnan Hosp, Ctr Reprod Med, 169 East Lake Rd, Wuhan 430071, Hubei, Peoples R China.