The predictor of preterm labour is cervix length (LQ)
a. There is an inverse correlation between cervical length and the frequency of preterm delivery.
b. The high negative predictive value avoids unnecessary interventions such as tocolysis or cerclage in high-risk pregnancies.
c. In contrast, a length of 25 mm or less at 28-30 weeks of gestation is associated with a significantly increased incidence of preterm delivery.