Gestational age at cervical length measurement and preterm birth in twins.
Ultrasound Obstet Gynecol
; 40(1): 81-6, 2012 Jul.
Article
en En
| MEDLINE
| ID: mdl-22045546
ABSTRACT
OBJECTIVES:
To estimate the risk of preterm delivery of twin pregnancies based upon sonographic cervical length measurement and gestational age at measurement.METHODS:
Twin pregnancies that delivered between 1999 and 2005 and that underwent sonographic measurement of cervical length between 13 and 34 + 6 weeks' gestation were identified and a retrospective review performed. Women with anomalous pregnancies, multifetal reduction, cerclage placement or medically indicated deliveries before 35 weeks were excluded. Logistic regression analysis was used to estimate the risk of preterm delivery before 35 weeks.RESULTS:
A total of 561 women underwent 2975 sonographic cervical length measurements during the study period. The rate of preterm delivery before 35 weeks was 19.4%. The risk of delivery before 35 weeks decreased by approximately 5% for each additional mm of cervical length (odds ratio (OR) 0.95 (95% CI, 0.93-0.97); P < 0.001) and by approximately 6% for each additional week at which the cervical length was measured (OR 0.94 (95% CI, 0.92-0.96); P < 0.001).CONCLUSION:
The gestational age at which cervical length is measured is an important consideration when estimating the risk of spontaneous preterm birth in twins. The risk of preterm delivery is increased at earlier gestational ages and as cervical length decreases.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Gemelos
/
Cuello del Útero
/
Ultrasonografía Prenatal
/
Nacimiento Prematuro
/
Medición de Longitud Cervical
Tipo de estudio:
Diagnostic_studies
/
Etiology_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
/
Female
/
Humans
/
Newborn
/
Pregnancy
País/Región como asunto:
America do norte
Idioma:
En
Año:
2012
Tipo del documento:
Article