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transvaginal cervical length

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Chapter 19 - Risk Assessment and Screening for Preterm Birth in Multiple Pregnancy
- By Amanda Roman, Alexandra Ramirez, Guillermo Gurza, Vincenzo Berghella
Edited by Leanne Bricker, Julian N. Robinson, Baskaran Thilaganathan, St George's Hospital Medical School, University of London
Book:

Management of Multiple Pregnancies

Published online:

11 October 2022

Print publication:

27 October 2022, pp 201-209
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Summary

Twins represent 3% of all live birth. However, they account for 20% of all preterm deliveries, with 60% delivering before 37 weeks, and 10.7% before 32 weeks. Twin pregnancies have five times higher risk of early neonatal and infant death related to prematurity. Monochorionic twins have higher incidence of both indicated and spontaneous preterm delivery compared with dichorionic twins. Transvaginal cervical length before 24 weeks is the best tool to predict preterm birth, independent of other risk factors.