Altrenogest is primarily used in veterinary medicine, especially in the management of reproductive cycles in animals. It is commonly administered to synchronize estrus in swine and horses, allowing for more efficient breeding programs. In mares, it helps suppress estrus during competitions or training by mimicking the effects of progesterone, enabling owners to control the timing of the heat cycle. The compound is also used to treat certain reproductive disorders, such as irregular cycles or anestrus, supporting fertility management in livestock. Its ability to regulate hormonal activity makes it a valuable tool in animal husbandry and breeding operations.