CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 10,2007, Pages 649-651, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 10,2007, Pages 652-654, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 10,2007, Pages 655-657, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 10,2007, Pages 658-661, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 10,2007, Pages 662-665, Dol: