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Uterine torsion is an extremely rare pregnancy-related complication. Its diagnosis is often difficult due to unspecific clinical symptoms, which can be mistaken for other conditions such as placental abruption. A 23-year-old pregnant woman with gestational age of 25 weeks presented with acute abdominal pain and hypertonic uterus. Vaginal examination revealed a septated vagina, double cervix, and double uterus. Bedside sonography revealed absence of fetal cardiac activity and signs of placental abruption. The patient was emergently operated with a preliminary diagnosis of severe placental abruption in the uterus didelphys. During surgery, we noted a double uterus and the fetus had implanted in the right uterus, which was twisted 180 degrees to the left. After detorsion, a low transverse hysterotomy was performed to extract the dead fetus. However, subsequently, the patient developed uterine atony. Subtotal hysterectomy and right adnexectomy were inevitable due to failure of conservative treatment with B-lynch suture. The patient’s postoperative condition was stable, and she was discharged after 5 days.