Mucinous cystadenomas may reach a large size and may also tend to be hormonally responsive during pregnancy. A 25-year-old woman was presented with the labour pain at 40 weeks of gestation. Sonographic examination demonstrated a multiloculated, 38 cm in diameter, huge cystic mass at the right side of the uterus. After delivery of baby with cesarean section, ovarian cystectomy was performed. His...