alexa Cervical length at 23 weeks of gestation: prediction of spontaneous preterm delivery.
Reproductive Medicine

Reproductive Medicine

Reproductive System & Sexual Disorders: Current Research

Author(s): Heath VC, Southall TR, Souka AP, Elisseou A, Nicolaides KH

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Abstract OBJECTIVE: To examine the potential value of routine measurement of cervical length in singleton pregnancies at 23 weeks of gestation in the prediction of the risk for early spontaneous preterm delivery. METHODS: Cervical length was measured by sonography at 23 weeks in 2567 singleton pregnancies in women attending for routine antenatal care. In 43 women, the length was < or = 15 mm and 21 of these were managed expectantly, whereas in 22 cases a cervical cerclage was placed. In the pregnancies that were managed expectantly, the relation between cervical length and preterm delivery was examined and the risk of spontaneous delivery at < or = 32 weeks was estimated. RESULTS: Cervical length at 23 weeks was < or = 15 mm in 1.7\% of cases; this group contained 86\%, 58\% and 20\% of pregnancies that delivered spontaneously at < or = 28, < or = 32 and < or = 36 weeks, respectively. The risk for delivery at < or = 32 weeks decreased from 78\% at a cervical length of 5 mm to 4\% at 15 mm and 0.5\% at 50 mm. CONCLUSIONS: Cervical length at 23 weeks is < or = 15 mm in < 2\% of the population; this group contains about 90\% and 60\% of the women delivering at < or = 28 and < or = 32 weeks, respectively. Measurement of cervical length provides accurate prediction of risk for early preterm delivery. This article was published in Ultrasound Obstet Gynecol and referenced in Reproductive System & Sexual Disorders: Current Research

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