CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 06,2009, Pages 401-404, Dol:10.3760/cma.j.issn.0529-567x.2009.06.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 06,2009, Pages 405-408, Dol:10.3760/cma.j.issn.0529-567x.2009.06.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 06,2009, Pages 409-412, Dol:10.3760/cma.j.issn.0529-567x.2009.06.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 06,2009, Pages 413-417, Dol:10.3760/cma.j.issn.0529-567x.2009.06.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 06,2009, Pages 418-421, Dol:10.3760/cma.j.issn.0529-567x.2009.06.005