American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2005 > 193 > 4 > 1554-1560
American Journal of Obstetrics and Gynecology > 2005 > 193 > 4 > 1478-1485
American Journal of Obstetrics and Gynecology > 2005 > 193 > 4 > 1312-1322
American Journal of Obstetrics and Gynecology > 2005 > 193 > 4 > 1292-1301