Abstract
Objective: The aim of our study was to estimate whether the placement of cerclage in pregnancy to prevent preterm birth (PTB) is associated with higher incidence of intrapartum cervical lacerations. Methods: A retrospective cohort study was conducted on singleton pregnancies with risk factors for PTB. The study group consisted of women with either a history- or ultrasound-indicated cerclage placed between 12 and 24 weeks of gestation, while the control group consisted of women with similar risk factors for PTB but who did not receive a cerclage. Primary outcome was the incidence of intrapartum cervical lacerations. A sample size calculation was performed on the basis of the results of previous studies on cervical lacerations. Results: We identified 134 women who had a cerclage placed in pregnancy. They were compared with 236 controls with no cerclage. Cases and controls had similar risk factors for cervical lacerations. Cervical lacerations occurred with similar frequencies in the cerclage and no-cerclage group (2.2 vs 1.3%, p = 0.78). There was no significant difference between the two groups for the risk of cervical lacerations (RR 1.76, 95% CI: 0.36–8.60). Conclusions: Cerclage placement during pregnancy is not associated with an increased risk of intrapartum cervical lacerations.
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