American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2018 > 218 > 1 > B2-B8
American Journal of Obstetrics and Gynecology > 2018 > 218 > 5 > 483-489
American Journal of Obstetrics and Gynecology > 2018 > 218 > 1 > B2-B8
American Journal of Obstetrics and Gynecology > 2018 > 218 > 5 > 483-489