A 3-year-old, 2.5-kg British shorthair cat with dystocia and protrusion of a mass through the vulva was presented to the Obstetrics and Gynaecology Clinic, Faculty of Veterinary Medicine, Istanbul University. Upon clinical examination, a complete uterine prolapse was diagnosed. Because of a blood blister and oedema in the uterine horns, ovariohysterectomy treatment was decided. During laparotomy, one foetus was detected in the cranial portion of the left uterine horn. After manual reduction and intraabdominal withdrawal of the prolapsed uterus, a caesarean section was performed to deliver the foetus. The last litter and the queen were discharged from the clinic in good health.