What is foal heat in mares?

Foal heat refers to the first estrus cycle that a mare experiences after giving birth, typically occurring about 5 to 10 days postpartum. During this time, the mare may exhibit signs of estrus and can potentially conceive if bred. It is often characterized by a shorter duration and may have a lower fertility rate compared to subsequent cycles. Breeders sometimes choose to breed mares during foal heat to maximize the chances of early conception.