[1] Peking Univ Third Hosp, Ctr Reprod Med, Dept Obstet & Gynecol, State Key Lab Female Fertil Promot, Beijing 100191, Peoples R China
[2] Peking Univ, Key Lab Assisted Reprod, Beijing Key Lab Reprod Endocrinol & Assisted Repro, Minist Educ, Beijing 100191, Peoples R China
[3] Peking Univ Third Hosp, Clin Stem Cell Res Ctr, Beijing 100191, Peoples R China
[4] Beijing Key Lab Reprod Endocrinol & Assisted Repro, Beijing 100191, Peoples R China
[5] Guangzhou Med Univ, Affiliated Hosp 3, Inst Obstet & Gynecol, Guangzhou 510150, Peoples R China