American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2000 > 183 > 1 > 12-17
American Journal of Obstetrics and Gynecology > 2000 > 183 > 1 > 46-51
American Journal of Obstetrics and Gynecology > 2000 > 183 > 1 > 12-17
American Journal of Obstetrics and Gynecology > 2000 > 183 > 1 > 46-51