Unruptured Pregnancy in Rudimentary Horn Presenting as Hemoperitoneum.

Unicornuate uterus accounts for 2.4–13 % of all mullerian anomalies [1]. An estimated 75–90 % of unicornuate uteri with rudimentary horns are non-communicating. Pregnancy in rudimentary horn is rare, i.e., 1:76,000 and 1:1,40,000 pregnancies [2], and is associated with 70 % risk of uterine rupture occurring before 20 weeks of gestation leading to life-threatening intraperitoneal hemorrhage [3]. They commonly present with abdominal pain which may occur before or after rupture [4]. Mullerian abnormality is frequently associated with renal and axial skeletal abnormalities. We report a case of unruptured rudimentary horn pregnancy with hemoperitoneum at 19 ? 5 weeks of gestation, diagnosed as bicornuate uterus with pregnancy in left horn in first trimester USG.