American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2000 > 183 > 2 > 383-388
American Journal of Obstetrics and Gynecology > 2000 > 183 > 5 > 1238-1242
American Journal of Obstetrics and Gynecology > 2000 > 183 > 2 > 383-388
American Journal of Obstetrics and Gynecology > 2000 > 183 > 5 > 1238-1242