Here's a breakdown of what it means:
* Ovulation: During estrus, a mare's ovaries release an egg, making her capable of becoming pregnant.
* Physical Changes: There are several physical signs that indicate a mare is in season, including:
* Swollen vulva: The vulva becomes larger and more prominent.
* Mucous discharge: A clear, sticky mucous discharge may be present.
* Winking: The vulva may "wink" or contract rhythmically.
* Restlessness and aggression: Some mares may become restless, nervous, or aggressive towards other horses.
* Frequent urination: Mares may urinate more frequently.
* Tail swishing: Mares may swish their tails more often.
* Standing for the stallion: This is a clear sign of estrus, as mares will allow a stallion to mount her.
How long does it last?
The estrous cycle in horses is typically around 21 days. A mare will be in estrus for 4-7 days within that cycle.
Important Note: It's essential to understand that these are general signs, and some mares may not show all of them. If you're unsure whether a mare is in season, it's best to consult a veterinarian.