Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 724-728, Dol:10.3760/cma.j.issn.0529-567x.2011.10.002
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 729-735, Dol:10.3760/cma.j.issn.0529-567x.2011.10.003
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 742-747, Dol:10.3760/cma.j.issn.0529-567x.2011.10.006
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 748-752, Dol:10.3760/cma.j.issn.0529-567x.2011.10.007
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 753-757, Dol:10.3760/ema.j.issn.0529-567x.2011.10.008