CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 07,2011, Pages 481-486, Dol:10.3760/cma.j.issn.0529-567x.2011.07.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 07,2011, Pages 487-491, Dol:10.3760/cma.j.issn.0529-567x.2011.07.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 07,2011, Pages 492-495, Dol:10.3760/cma.j.issn.0529-567x.2011.07.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 07,2011, Pages 496-500, Dol:10.3760/cma.j.issn.0529-567x.2011.07.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 07,2011, Pages 501-504, Dol:10.3760/cma.j.issn.0529-567x.2011.07.005