Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 10,2012, Pages 721-725, Dol:10.3760/cma.j.issn.0529-567x.2012.10.001
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 10,2012, Pages 726-729, Dol:10.3760/cma.j.issn.0529-567x.2012.10.002
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 10,2012, Pages 730-733, Dol:10.3760/cma.j.issn.0529-567x.2012.10.003
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 10,2012, Pages 734-737, Dol:10.3760/cma.j.issn.0529-567x.2012.10.004
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 10,2012, Pages 738-741, Dol:10.3760/cma.j.issn.0529-567x.2012.10.005