Triplet pregnancies in horses are extremely rare and pose serious risks to both the mare and the foals. Unlike animals that regularly give birth to litters, horses are biologically designed to carry only one foal at a time. Mares typically release a single egg during ovulation, making multiple conceptions uncommon. Even when more than one embryo forms, the mare’s body often naturally reabsorbs extra embryos early in pregnancy. This occurs because the uterus and placenta cannot adequately support