CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 09,2005, Pages 577-580, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 09,2005, Pages 581-584, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 09,2005, Pages 585-590, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 09,2005, Pages 591-594, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 09,2005, Pages 595-597, Dol: