EP01.18: Sonographic evaluation of cervical length in an asymptomatic singleton pregnancies and the risk of preterm delivery

Abstract

This study measured cervical length (CL) at 11-14 and 23-24 weeks of gestation to determine the potential value of difference between measurements for prediction of preterm delivery (PTD). A retrospective, cohort study was performed with 2638 singleton pregnancies from 1 January 2013 to 31 December 2017. CL was measured consecutively on transvaginal sonography at 11–14weeks (Cx1) and 23–24 weeks (Cx2), by trained operators as a straight line from external to internal os. Medical records were reviewed for demographic, medical and obstetric history; complications during the current pregnancy and delivery data. Cx1, Cx2 and the change between scans were evaluated and correlated to PTD prediction. Among 2638 patients, 2435 (92.3%) delivered at term (≥ 37 weeks) and 203 (7.3%) preterm (<37 weeks). Cx1 was not a good predictor of PTD (P = 0.70). Cx2 was significantly shorter in the PTD group (P < 0.05). The correlation between CL change and PTD was not significant (P = 0.55). Sonographic measurement of CL at 11-14 weeks gestation and the difference between CL in the first and second scans are not reliable predictors of PTD. Cervical length at 21-24 weeks in low-risk women was predictive of PTD. Once short CL was observed, risk of preterm delivery was greatly increased. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.