The introduction of a universal transvaginal cervical length screening program is associated with a reduced preterm birth rate.

Background: Midtrimester sonographic short cervix is a good predictor of preterm birth in singleton pregnancies.

Objective: This study aimed to assess the impact of implementing a universal transvaginal cervical length screening program on preterm birth rate.

Study Design: This study consisted of 2 parts: a before-and-after multicenter study and a study on the ECHOCOL ("echo"="ultrasound" and "col"="cervix" in French) prospective cohort.