Cervical cerclage is a surgical procedure for cervical insufficiency, which is a cause of recurrent miscarriage in middle pregnancy. As the gestational week increases, the uterus becomes more tense and the cervix starts to dilate without contractions and miscarriage soon follows. With a clear diagnosis of cervical insufficiency, laparoscopic cervical ligation can be performed before the next pregnancy, or cervical ligation can be done at about 16-17 weeks of pregnancy, which is a preventive ligation, and emergency ligation, which is an emergency ligation when the opening of the cervix is already open.