Which of the following is the cut-off value of cervical length at 24 weeks of gestation for prediction of preterm delivery?
0.5 cm
1.5 cm
2.5 cm
3.5 cm
Factors required for the prediction of preterm labour includes: presence of symptoms of preterm labour, uterine contraction of >= 4 per hour, cervical length <=2.5cm, presence of fibronectin in cervicovaginal discharge between 24-34 weeks, Bishop score >=4, cervical dilation >2cm and effacement of 80%, vaginal bleeding and prior preterm bih. Ref: Textbook of Obstetrics By D.C. Dutta 6th Edition, Pages 314-315