mares heat cycle

Question
hello madam, when does a mare come into heat??? i meant, at what age, in which season they come into heat. for example, a bitch comes into heat for every 6 months after the age of 2. considering the above example, please explain me the heat cycle of a mare. Do mention, the time period upto which she will be in heat.


Answer
they will start to go into heat at 3 years old. Most mares will come into heat every 21 days. Usually 21 days after the day the mare first comes into heat, she will start into heat again, but some mares vary anywhere from 18 to 31 days in their heat cycles. Heat periods are generally longer earlier in the breeding season and many older mares have longer than average heat cycles