Can sonographic measurements and changes in cervical length during pregnancy predict preterm labour in an asymptomatic low-risk population?

This study measured cervical length (CL) at 14-16 and 21-24 weeks of gestation and assessed whether the difference between the measurements is predictive of preterm delivery (PTD).This retrospective, cohort study included patients with two consecutive CL measured with transvaginal sonography at 14-16 weeks of gestation (CLAmong the 216 patients, 196 (90.7%) delivered at term (≥37 weeks) and 20 (9.3%) preterm (37 weeks). CLSonographic measurement of CL at 14- to 16-week gestation and the difference between CL in the first and second scans are not reliable predictors of PTD. However, cervical length at 21-24 weeks in low-risk women is predictive of this complication.