Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 01,2012, Pages 5-8, Dol:10.3760/cma.j.issn.0529-567x.2012.01.003
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 01,2012, Pages 9-13, Dol:10.3760/ema.j.issn.0529-567x.2012.01.004
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 01,2012, Pages 14-18, Dol:10.3760/cma.j.issn.0529-567x.2012.01.005
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 01,2012, Pages 19-23, Dol:10.3760/cma.j.issn.0529-567x.2012.01.006
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 01,2012, Pages 24-28, Dol:10.3760/cma.j.issn.0529-567x.2012.01.007