[1] Peking Univ, Hosp 3, Ctr Reprod Med, Dept Obstet & Gynecol, Beijing, Peoples R China
[2] Robinson Res Inst, Dept Obstet & Gynaecol, Adelaide, SA, Australia
[3] Peking Univ, Hosp 3, Dept Obstet & Gynaecol, Ctr Reprod Med, Beijing, Peoples R China
[4] Monash Hlth, Monash Med Ctr, Clayton, Vic, Australia
[5] Monash Univ, Dept Obstet & Gynaecol, Clayton, Vic, Australia