CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 793-796, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 797-800, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 801-803, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 804-808, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 809-812, Dol: