JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 21, Issue 5,2005, Pages 260-262, doi:10.3969/j.issn.1003-6946.2005.05.003
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 21, Issue 5,2005, Pages 309-310, doi:10.3969/j.issn.1003-6946.2005.05.020
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 21, Issue 5,2005, Pages 301-303, doi:10.3969/j.issn.1003-6946.2005.05.018
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 21, Issue 5,2005, Pages 314, doi:10.3969/j.issn.1003-6946.2005.05.028
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 21, Issue 5,2005, Pages 290-292, doi:10.3969/j.issn.1003-6946.2005.05.014