History- or ultrasound-based cerclage placement and adverse perinatal outcomes.

Objective: To determine whether cerclage based on serial transvaginal ultrasound (STVUS) vs. cerclage based on obstetric history (prior multiple midgestation losses) is superior for treatment of cervical insufficiency.

Study Design: This retrospective study evaluated all history-based or ultrasound-based cerclages in singleton pregnancies over a 5-year period at the University of Mississippi Medical Center.