Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 02,2012, Pages 85-89, Dol:10.3760/cma.j.issn.0529-567x.2012.02.002
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 02,2012, Pages 90-95, Dol:10.3760/cma.j.issn.0529-567x.2012.02.003
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 02,2012, Pages 96-100, Dol:10.3760/cma.j.issn.0529-567x.2012.02.004
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 02,2012, Pages 101-104, Dol:10.3760/cma.j.issn.0529-567x.2012.02.005
Chinese Journal of Obstetrics and Gynecology, Volume 47, Issue 02,2012, Pages 105-109, Dol:10.3760/cma.j.issn.0529-567x.2012.02.006