Foals are born after a gestation period of approximately 11 months. Birth takes place quickly, consistent with the status of a horse as a prey animal, and more often at night than during the day. Labor lasting over twenty-four hours may be a sign of medical complications. Unlike most predators which are altricial (born helpless), horses are precocial, meaning they come into the world relatively mature and mobile. Healthy foals can typically keep up with the rest of the herd only a few hours after birth. If a foal has not eaten within twelve hours, it may require assistance.