Krukenberg tumor (KT), defined as an adenocarcinoma that metastasizes to the ovary from different primary tumor sites, 1 has an extremely poor prognosis, with a 5-year survival rate ranging from 12% to 23.4%. 2,3 Gastric cancer has been reported as the most frequent primary source responsible for approximately 50% of KTs. 3 A KT from primary gastric carcinoma very rarely complicates pregnancy, and its early diagnosis is often difficult because the persistent gastrointestinal symptoms mimic the nausea and vomiting of pregnancy and can mask the presence of a gastric mass. To our knowledge, the color Doppler sonographic appearance of a KT in pregnancy has been previously described in only 1 case. 4 Here we report a case of a KT secondary to gastric carcinoma in a pregnant woman with only pelvic pain and no gastrointestinal symptoms. The prenatal diagnosis was made at 25 weeks' gestation with color Doppler sonography.A 38-year-old woman, gravida 1, at 25 weeks' gestation was referred to the Department of Obstetrics and Gynecology at Catholic University of Rome because of pelvic pain. Her family history was negative for malignancy, and she had no prior medical or gynecologic illnesses. She had no symptoms of nausea, vomiting, weight loss, or urinary tract difficulties.The patient underwent transabdominal and transvaginal sonography (Voluson I; GE Healthcare, Milwaukee, WI) showing an encapsulated ovoid solid ovarian mass (165 × 87 × 90 mm) with regular margins completely replacing the left adnexa behind the uterus in the Douglas pouch. The right ovary was not evaluable, and no ascites was documented.