Pregnancy in the rudimentary horn is a rare form of ectopic pregnancy and carries grave consequences for the mother and foetus. 90% of them present with intra peritoneal haemorrhage in the 2nd trimester due to rupture of the horn. We present a case report of a 19 yr old unmarried primi gravida at 16 weeks of unruptured pregnancy in the rudimentary horn. Laparotomy was done and the rudimentary horn with the unruptured pregnancy was excised. Postop recovery has been uneventful.