Background and aim: Ovarian pregnancy is an uncommon form of ectopic pregnancy which usually diagnosed so late. The aim of this study is to report a case of ovarian ectopic pregnancy

Case presentation: A 19 years old woman, with a history of polycystic ovary, first pregnancy, gestation age 9 weeks and 4 days, visited the doctor. She was complaining of severe abdomen pain and vaginal spotting and she was bedridden because of threatened miscarriage. She had discharged from hospital with progesterone suppository prescription. Requesting a transvaginal ultrasound and heterogeneous echogenic mass (size18×8/5) was shown near the left ovary. It was shown as ectopic pregnancy. The patient was hospitalized by ectopic pregnancy in ovary diagnosis and she was treated by methotrexate.

Conclusion: In pregnant women that complain of bleeding and spotting in early pregnancy, in addition to threatened abortion, ectopic pregnancy should exist even in the absence of clinical symptoms, should be considered.