Ectopic pregnancy will unavoidably result in abortion or rupture. Ultrasound examination and β-hcg measurement are required, regarding symptomatic women with positive pregnancy test, in order to early detect cases of ectopic pregnancy. Here we report a case of a woman presented to the emergency depart- ment with acute abdomen and hemodynamic instability. History revealed a period of amenorrhea of 13 weeks and pregnancy test was found positive. Sonographic examination showed left adnexal swelling with viable fetus inside, hemoperitoneum and thus immediate laparotomy was decided. Left salpingo-oophorec- tomy was performed and post-operative course of the patient was uneventful. According to this case, ec- topic pregnancy should not be eliminated from differential diagnosis when it comes to pregnant women with relevant clinical presentation, even in advanced gestational age.