Cervical cerclage refers to a variety of procedures that use sutures or synthetic tape to reinforce the cervix during pregnancy in women with a history of a short cervix. The cervix is the lower part of the uterus that opens to the vagina.

Cervical cerclage can be done through the vagina (transvaginal cervical cerclage) or, less commonly, through the abdomen (transabdominal cervical cerclage).

Your health care provider might recommend cervical cerclage if your cervix is at risk of opening before your baby is ready to be born or, in some cases, if your cervix begins to open too early. However, cervical cerclage isn't appropriate for everyone. It can cause serious side effects and doesn't always work. Some women who have a cerclage placed for a short cervix might experience preterm labor. Understand the risks of cervical cerclage and whether the procedure might benefit you and your baby.

Source
https://www.mayoclinic.org/tests-procedures/cervical-cerclage/about/pac-20393435