Cervicovaginal fistula formation: a new complication of Shirodkar cerclage.

In this article, cervicovaginal fistula formation is reported for the first time as a complication of failure to remove a cervical cerclage during labor. Along with the available literature, the case presented here suggests the value of timely removal of a cerclage in the face of strong uterine contractions. Should cervical laceration/rupture occur, immediate repair should be attempted. If chronic cervicovaginal fistula occurs, preterm delivery through the defect and frank uterine rupture are risks with succeeding pregnancies.