Predictive role of transvaginal ultrasonographic measurement of cervical length at 34 weeks for late pre-term and late-term deliveries in nulliparous women

Objective: To investigate the predictive role of transvaginal ultrasonographic measurement of cervical length (CL) at 34 weeks of gestation in determining late-preterm and late-term deliveries in nulliparous women.Methods: CL was measured by transvaginal ultrasonography at 34 weeks in 318 women (singleton, nulliparous, low-risk and vertex presentation). All women were followed-up till birth and delivered at hospital. Deliveries were classifed according to gestational week as late-preterm (34(0/7) to 36(6/7) weeks), term (37(0/7) to 40(6/7) weeks) and late-term (41(0/7) to 41(6/7) weeks).Results: There was a significant correlation between CL at 34 weeks and gestational week at delivery (r=0.614, p