RESUMO
Huge ovarian cyst are found in less than 1% of all ovarian cyst in pregnancy and are associated with poor feto-maternal outcome. A 28 years old G2P1 with history of normal vaginal delivery 3 years back was referred from local health post with complains of intermittent pain abdomen at 29 weeks. Her scan showed huge ovarian cyst of 18.9×17.6 cm with multiple thick septation. Woman was conservatively managed till term and elective surgery was planned however she presented in labour with breech presentation at 39 weeks and 4days. Emergency lower segment caesarian section along with left sided salpingo-oophorectomy was done along with delivery of 2.5 kg healthy female baby. Histopathology was suggestive of mucinous cystadenoma of ovary. Although antepartum removal of ovarian cyst has been recommended to ensure good pregnancy outcome, expectant management and timed intervention can be adopted for pregnancy with huge ovarian cysts. Keywords: mucinous cystadenoma; ovarian cyst; pregnancy.