The incidence of ovarian malignancy associated with pregnancy is very rare, with reported coexistence varying from one in every 12,000 to 52,800 pregnancies. Furthermore, most cases are found at early stages of disease and early pregnancies when the prognosis is good. We herein present a case of 36 weeks' gestation with advanced ovarian carcinoma incidentally found during cesarean section for intolerable anal pain. A CT scan demonstrates three lesions in the parenchyma of liver. The liver needle biopsy by CT scan guidance has allowed the document of metastatic adenocarcinoma. Two days after operation, elevation of the patient's plasma levels of CEA and CA125 also were found. Although high dosage of cisplatin-based combination chemotherapy was administered, the patient still died of progressive disease in 2 months later.