Cesarean section in 19 mares. Results and postoperative fertility.

The case records of 19 mares undergoing caudal ventral midline celiotomy for cesarean section were reviewed. Surgical exposure to the uterus was good, and the incisions healed by first intention in surviving mares. Seventeen mares (89%) survived to time of hospital discharge. Six foals (32%) were delivered alive, of which three were euthanatized because of severe deformity (1 died on day 6 and 2 survived to time of discharge). The most frequent postoperative complications were abdominal pain (13 mares), anemia (10 mares), and retained placenta (6 mares). Sixteen mares were bred during at least one season after the cesarean section and eight (50%) produced at least one foal. The collective foaling rate for these mares, bred a total of 25 seasons, was 36%. Only one mare bred during the same year as the surgery produced a live foal. The collective foaling rate for mares bred after the year of the surgery was 50%.