Background: Ovarian cyst in pregnancy though uncommon but may be associated with adverse maternal and fetal outcome. Case Presentation: A 30 year old multi gravida, presented during pregnancy at 34 weeks with antenatal ultrasonographic diagnosis of huge unilateral ovarian cyst and normal obstetrics findings. Elective lower segment caesarean section (LSCS) with left salpingo-oophorectomy was done at 37 weeks of gestation. Conclusion: Though a rare event but Ovarian cyst in pregnancy must be followed up carefully. Early diagnosis, timely and appropriate intervention is the key to the best of maternal and fetal outcome. With proper planning, management and expertise the pregnant women with ovarian cyst can have a good maternal and fetal outcome.