[1] Fudan Univ, Inst Reprod & Dev, Obstet & Gynecol Hosp, Shanghai 200011, Peoples R China
[2] Chinese Acad Med Sci, Res Units Embryo Original Dis, Shanghai, Peoples R China
[3] Zhejiang Univ, Sch Med, Minist Educ, Key Lab Reprod Genet, Hangzhou, Peoples R China
[4] Shanghai Key Lab Embryo Original Dis, Shanghai, Peoples R China