[Uterine horn rupture at 23 weeks gestation: a case report].

Bicornuate uterus with rudimentary horn is a rare disability. Pregnancy can accidentally settle inside the rudimentary horn; in this case, it becomes apparent by uterine rupture generally in the second trimester. Bicornuate uterus should be diagnosed early, before pregnancy if possible. Abdominal pain of unknown origin occurring during the second trimester of pregnancy is the most frequent sign.