JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 11,2007, Pages 672-674, doi:10.3969/j.issn.1003-6946.2007.11.011
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 11,2007, Pages 702-703, doi:10.3969/j.issn.1003-6946.2007.11.022
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 11,2007, Pages 682-684, doi:10.3969/j.issn.1003-6946.2007.11.015
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 11,2007, Pages 696-697, doi:10.3969/j.issn.1003-6946.2007.11.019
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 11,2007, Pages 689-691, doi:10.3969/j.issn.1003-6946.2007.11.017