Objective To determine the obstetric results of cervical cerclage at the Leon Hospital from 1998 to 2007. Material and method: We performed an observational, retrospective, descriptive study. A total of 57 cerclages were analyzed. The following variables were gathered: maternal age, indication for cerclage, result and date of the Hegar test, parity, cervical incompetence risk factors, gestational age during the surgery, the technique used, ultrasonographic cervical length, gestational age at delivery, type of labor, cervical dilatation time, weight and Apgar test of the newborn. Results Four patients were excluded and 38 patients had a term pregnancy. There were four first trimester abortions, six second trimester abortions and five premature births. There were five complications: premature rupture of membranes in two patients, chorioamnionitis in one patient and cervical fibrosis in two patients. Conclusions The cerclage success rate was 79.2%. The success rate of elective cerclage was 85.1% and that of urgent interventions was 33.3%. A statistically significant association was found between success and gestational age at cerclage.