American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 1996 > 174 > 2 > 583-588
American Journal of Obstetrics and Gynecology > 1996 > 174 > 2 > 730-736
American Journal of Obstetrics and Gynecology > 1996 > 174 > 2 > 583-588
American Journal of Obstetrics and Gynecology > 1996 > 174 > 2 > 730-736