Background: Congenital uterine malformations are the result of disturbances in mullerian duct development. In patients with recurrent miscarriage, the reported frequency of uterine anomalies varies widely, from 1.8% to 37.6%. There are reports in which cervical cerclage has been shown to prevent preterm labor in uterine anomalies. The aim of this study was to compare the role of cervical cerclage in the pregnancy outcome of women with uterine anomaly. Methods: In this historical cohort study, 40 pregnant women with uterine anomaly were investigated for outcomes of pregnancy in regards to preterm and term deliveries. The participants were divided into two groups: the case group included 26 women with uterine anomaly for whom cervical cerclage was done and the control group was composed of 14 women with uterine anomaly in whom cervical cerclage was not performed. Comparison between the two groups was done and the data were analyzed by the use of chi square, Fisher’s exact test and t-test with SPSS software (version 11) and p