Fetal primary volvulus is a rare, life-threatening condition. The authors report a case of fetal primary volvulus which showed abnormal fetal heart rate (FHR) patterns on cardiotocography (CTG). A healthy, multiparous, 29-year-old woman was referred to the present facility due to fetal ascites. Ultrasound sonography (US) showed dilation of the fetal small bowel. CTG showed a non-reassuring FHR pattern and an emergency cesarian section was performed. A female newborn was delivered (1,515 grams, Apgar scores at one and five minutes: 5 and 7, respectively). Emergency laparotomy of the newborn showed necrotic volvulus without malrotation. The volvulus was resected, and a colostomy was performed. The infant was discharged three months after the operation without any complications.