American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2002 > 186 > 1 > 77-83
American Journal of Obstetrics and Gynecology > 2008 > 198 > 4 > 401.e1-401.e10
American Journal of Obstetrics and Gynecology > 2002 > 186 > 1 > 77-83
American Journal of Obstetrics and Gynecology > 2008 > 198 > 4 > 401.e1-401.e10