Short Cervical Length by Ultrasound and Cerclage

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Abstract
OBJECTIVE: To determine whether gravidas with short cervical length on endovaginal ultrasound examination, not in preterm labor, who underwent cervical cerclage have better outcomes compared with those with no cerclage. METHODS: This is an observational study in which data were collected prospectively on women who had ultrasound endovaginal cervical length measurement and were not in preterm labor. The subgroup of women who were ≤26 weeks’ at cervical measurement was analyzed separately. Short cervix was defined as ≤30 mm. After delivery, charts were reviewed for management and outcomes, performed at the discretion of the attending obstetrician. Two study groups were defined: those with cerclage and those with no cerclage. Predictor variables were cerclage and cervical lengths. Outcome variables were birth weight, gestational age at delivery, and neonatal outcomes. Data were analyzed using the χ-squared, Fisher’s exact, and Student’s t-tests, a p value of p values of <0.04 and <0.04, respectively). Analysis for the subgroup of women who were ≤26 weeks’ at first measurement revealed similar results. The relative risk for delivering at <30 weeks’ gestation, for incrementally shorter cervices, was less in the cerclage group. CONCLUSION: Cerclage in gravidas with short cervix measured by endovaginal ultrasound, not in preterm labor, may be associated with neonates of greater gestational age and birth weight, with fewer of these parturients delivering before 30 weeks’ gestation. A prospective randomized trial of treatment modalities for asymptomatic shortened cervix is needed.

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