Cervical length at 23 weeks of gestation: prediction of spontaneous preterm delivery
Article first published online: 24 DEC 2002
Copyright © 1998 International Society of Ultrasound in Obstetrics and Gynecology
Ultrasound in Obstetrics & Gynecology
Volume 12, Issue 5, pages 312–317, 1 November 1998
How to Cite
Heath, V. C. F., Southall, T. R., Souka, A. P., Elisseou, A. and Nicolaides, K. H. (1998), Cervical length at 23 weeks of gestation: prediction of spontaneous preterm delivery. Ultrasound Obstet Gynecol, 12: 312–317. doi: 10.1046/j.1469-0705.1998.12050312.x
- Issue published online: 24 DEC 2002
- Article first published online: 24 DEC 2002
- Manuscript Accepted: 10 SEP 1998
- Manuscript Revised: 8 SEP 1998
- Manuscript Received: 21 JUL 1998
- Cited By
- Ultrasound Screening;
- 23-Week Scan;
- Cervical Length;
- Preterm Delivery
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.
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 ≤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 ≤ 32 weeks was estimated.
Cervical length at 23 weeks was ≤ 15 mm in 1.7% of cases; this group contained 86%, 58% and 20% of pregnancies that delivered spontaneously at ≤ 28, ≤ 32 and ≤ 36 weeks, respectively. The risk for delivery at ≤ 32 weeks decreased from 78% at a cervical length of 5 mm to 4% at 15 mm and 0.5% at 50 mm.
Cervical length at 23 weeks is ≤ 15 mm in < 2% of the population; this group contains about 90% and 60% of the women delivering at ≤ 28 and ≤ 32 weeks, respectively. Measurement of cervical length provides accurate prediction of risk for early preterm delivery. Copyright © 1998 International Society of Ultrasound in Obstetrics and Gynecology