Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 03,2012, Pages 161-165, Dol:10.3760/cma.j.issn.0529-567x.2012.03.001
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 03,2012, Pages 166-170, Dol:10.3760/cma.j.issn.0529-567x.2012.03.002
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 03,2012, Pages 171-174, Dol:10.3760/cms.j.issn.0529-567x.2012.03.003
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 03,2012, Pages 175-178, Dol:10.3760/cms.j.issn.0529-567x.2012.03.004
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 03,2012, Pages 179-184, Dol:10.3760/cma.j.issn.0529-567x.2012.03.005