RESUMEN
The conventional treatment of cervical incompetence is cerclage operation. In most cases, the classical surgical cerclage methods described by McDonald and Shirodkar are performed. The cervicoisthmic cerclage is beneficial for the treatment of patients who have short cervix due to conization, cervisectomy or congenital anatomical deformity of uterus. This procedure is different from the classical McDonald and Shirodkar cerclages in that the suture site is placed at the junction of the cervix and the isthmus of uterine body. There are two approaches in cervicoisthmic cerclages, transabdominal and transvaginal ones. The transvaginal cervicoisthmic cerclage is easier to perform and less dependent on uterine size compared with the transabdominal cerclage. In addition there is less chance of direct uterine handling associated with bladder laceraton or fetal loss in transvaginal cervicoisthmic cerclage. We report two cases of transvaginal cervicoisthmic cerclage for the first time in Korea, in which patients have delivered at full term by cesarean section.