JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 7,2007, Pages 393-395, doi:10.3969/j.issn.1003-6946.2007.07.004
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 7,2007, Pages 436-437, doi:10.3969/j.issn.1003-6946.2007.07.020
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 7,2007, Pages 449-450, doi:10.3969/j.issn.1003-6946.2007.07.032
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 7,2007, Pages 448-449, doi:10.3969/j.issn.1003-6946.2007.07.031
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 7,2007, Pages 407-408, doi:10.3969/j.issn.1003-6946.2007.07.010