American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2018 > 218 > 1 > 98-102
American Journal of Obstetrics and Gynecology > 2018 > 218 > 2 > 256.e1-256.e13
American Journal of Obstetrics and Gynecology > 2018 > 218 > 1 > 98-102
American Journal of Obstetrics and Gynecology > 2018 > 218 > 2 > 256.e1-256.e13