What does it mean when a horse is in foal?

Mar 26, 2013 | FAQs, Horse Breeding - Foaling- Foals

A mare is pregnant. When the mare is foaling, she is actually in labor and giving birth. We say, “A mare foaled” when she gives birth. The foal is the young horse after birth. The newborn male is a colt and the new born female is a filly.