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Cervical dilatation on presentation for preterm labor and subsequent preterm birth
Helen Y How1, Jane C Khoury, Baha M Sibai
1Departments of Obstetrics and Gynecology, University of Cincinnati, Ohio, USA. Helen.How@nortonhealthcare.org
American Journal of Perinatology
|November 21, 2008
Summary
Cervical dilation at admission for preterm labor is linked to delivery timing. Even with minimal dilation (0-1 cm), significant risks of preterm birth exist, highlighting the need for careful monitoring.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Perinatology
Background:
- Preterm birth remains a leading cause of neonatal morbidity and mortality.
- Predicting the timing of delivery in cases of preterm labor is crucial for clinical management and resource allocation.
Purpose of the Study:
- To investigate the relationship between cervical dilatation at presentation and the risk of preterm delivery (< 32 weeks' gestation).
- To determine the interval from admission for preterm labor to delivery based on initial cervical dilatation.
Main Methods:
- Retrospective review of patients presenting with preterm contractions between 22 to 32 weeks' gestation.
- Multiple and logistic regression analyses to assess the association between cervical dilatation, gestational age, effacement, and preterm birth outcomes.
Main Results:
- Cervical dilatation at presentation was inversely associated with the interval to delivery.
- With 0-1 cm dilation, 20% delivered before 32 weeks and 38% before 35 weeks.
- With 6-10 cm dilation, 94% delivered before 32 weeks and 100% before 35 weeks.
- Cervical dilatation, gestational age, and effacement were significant predictors of preterm birth (< 32 weeks' gestation).
Conclusions:
- Cervical dilatation upon admission for preterm labor is a key predictor of delivery timing.
- Even with minimal cervical change, a substantial risk of preterm delivery persists, necessitating close observation and management.
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