Society for Maternal-Fetal Medicine Consult Series #65: Transabdominal cerclage

Cerclage is the mainstay of treatment for cervical insufficiency. Although transabdominal cerclage may have advantages over transvaginal cerclage, it is associated with increased morbidity and the need for cesarean delivery. In this Consult, we review the current literature on the benefits and risks of transabdominal cerclage and provide recommendations based on the available evidence. The following are Society for Maternal-Fetal Medicine recommendations: (1) we recommend that transabdominal cerclage placement be offered to patients with a previous transvaginal cerclage placement (history or ultrasound indicated) and subsequent spontaneous singleton delivery before 28 weeks of gestation (GRADE 1B); (2) we recommend maternal-fetal medicine consultation for counseling patients who may be candidates for transabdominal cerclage and those who have undergone transabdominal cerclage (Best Practice); (3) we suggest that both laparoscopic transabdominal cerclage and open transabdominal cerclage are acceptable and the decision of approach may depend on gestational age, technical feasibility, available resources, and expertise (GRADE 2B); (4) we suggest that transabdominal cerclage can be performed before pregnancy or in the first trimester of pregnancy with similar fetal outcomes. If a patient with an indication for transabdominal cerclage presents after the first trimester of pregnancy, transabdominal cerclage can still be considered before 22 weeks of gestation (GRADE 2C); (5) we recommend that routine transvaginal cervical length screening not be performed for patients with a transabdominal cerclage in situ (GRADE 1C); (6) we suggest that for individuals at risk of recurrent spontaneous preterm birth, including those with a transabdominal cerclage in situ, a risk-benefit discussion of supplemental vaginal progesterone be undertaken with shared decision-making (GRADE 2C); (7) we suggest that pregnancy loss be managed with dilation and curettage or dilation and evacuation with a transabdominal cerclage in situ or via usual obstetrical management after laparoscopic removal of the transabdominal cerclage, depending on gestational age and resources available (GRADE 2C); and (8) we suggest cesarean delivery between 37 0/7 and 39 0/7 weeks of gestation for patients with a transabdominal cerclage in situ (GRADE 2C).