Malignant germ cell tumor of ovary is a rare condition. Immature teratoma is uncommon tumor <1% of ovarian teratoma. Immature teratoma occurs most commonly in first two decades of life. Immature teratoma represents 3% of all teratoma, 1% of all ovarian cancer and 20% malignant ovarian germ cell tumor. Here we present a case of immature ovarian teratoma of ovary in pregnant women. 21 years old girl came with complaints bleeding per vaginum for a day. Her UPT was positive, P/A shoes mass palpable of about 24 week size. On USG, CT ABDOMEN bilateral adnexal mass lesion more on left than right( possibilities of dermoid cyst to be considered) with B/L hydrouretronephrosis, MTP done by medical method. Patient came with complaint of loss of appetite
