Risk factors for cervical insufficiency after term delivery.

Objective: Cervical insufficiency can be unexpected in a woman with a previous term birth. Our objective was to determine what risk factors, if any, place women with a term delivery at risk for cervical insufficiency in a subsequent pregnancy.

Study Design: Demographic characteristics were collected for a cohort of women with at least 1 previous term birth followed by cervical insufficiency (subject group) and for uncomplicated multiparous women (control group).