CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 07,2009, Pages 481-483, Dol:10.3760/cma.j.issn.0529-567x.2009.07.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 07,2009, Pages 484-487, Dol:10.3760/cma.j.issn.0529-567x.2009.07.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 07,2009, Pages 488-491, Dol:10.3760/cma.j.issn.0529-567x.2009.07.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 07,2009, Pages 492-495, Dol:10.3760/cma.j.issn.0529-567x.2009.07.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 07,2009, Pages 496-499, Dol:10.3760/cma.j.issn.0529-567x.2009.07.005