American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2000 > 183 > 2 > 389-395
American Journal of Obstetrics and Gynecology > 2000 > 183 > 5 > 1162-1165
American Journal of Obstetrics and Gynecology > 2000 > 183 > 2 > 389-395
American Journal of Obstetrics and Gynecology > 2000 > 183 > 5 > 1162-1165