being 320 to 370 days. Usually just one young is born; twins are rare. When a domesticated mare foals, she nurses the foal for at least four to six months before it is weaned, though mares in the wild may allow a foal to nurse for up to a year.

The estrous cycle, also known as "season" or "heat" of a mare occurs roughly every 19-22 days and occurs from early spring into autumn. As the days