Why Do Horses Fall After Mating

If you’re a horse breeder or owner, you know it’s crucial to understand their behavior for better control and management.

Some of the behaviors that mares in heat show are hyperactivity, restlessness, and frequent urination. A unique behavior that horses exhibit after copulation is falling. If your horse falls after mating, you should not panic at all.

Why do Horses fall after mating

However, it’s crucial to find out if your horse has any other issues aside from the typical fall after copulation. Here are some of the reasons that make horses fall after mating:

First Time Mating

Many horses fall after mating for the first time. This is something normal in horses as they may be overwhelmed by the excessively aggressive stallions.

Therefore, after mating, the horse falls to regain its energy and allow the heart pumping rate to return to normal. Other horses will fall every time they breed

Hormonal Imbalance

Another reason that causes mares to fall after mating is hormonal imbalance. Like humans, hormones also regulate several processes in the horse’s body. Thus, if there is an imbalance in hormones, it may affect the horse’s behavior. And one of the things that hormonal imbalance may cause is the falling of the horse after mating.

One of the things that cause hormonal imbalance in horses is the estrous cycle. The estrous cycle is the period when the mare is ovulating.

Also, it’s the time when the mare can conceive when she mates. If the estrous cycle is uncontrollable, the mare might fall after mating.

See a veterinarian if your horse doesn’t fall after mating. But if it does, the vet will as assist you as needed.


The short term stress is good for the horse as it helps to keep them safe. But if the stress prolongs, it can significantly impact the horse’s health and overall well-being.

Chronic stress occurs when a horse’s stress hormone levels increase due to an exceedingly irritating situation. Excess stress can cause changes in the horse’s behavior, leading to health challenges.

Horses may undergo natural stress during the reproductive stage, such as when mating. When this happens, the horse may react by falling after mating. If not managed well, the natural stress can turn into chronic stress that may affect your horse even after conceiving.

The stress experienced by horses during the reproductive stage is usually because of the estrus. When a mare is feeling the heat, a follicle develops on one of the ovaries and causes her to have an urge for frequent urination.

This bodily change can lead to discomfort and long-term stress. Hence, it’s crucial to observe your horse closely when it shows an unusual change in behavior such as falling after mating.

A horse can also experience stress because of housing conditions, changes in exercise, or even a poor diet. Make sure your horse is comfortable to avoid increasing its stress level.


Syncope is a condition where a horse faints because of insufficient blood flow to the brain. It also shows that there is low arterial blood pressure. Most horses that suffer from this condition have heart problems. If a horse has syncope or heart issues, it may faint after mating.

Apart from the horse fainting, it may also get a cardiac arrest, which can be detrimental. That’s why it’s crucial to have your horse regularly checked by the veterinarian.

Why some Horses fall after mating

However, it’s normal for horses to have heart attacks while mating. Syncope is not life-threatening, and your horse will regain consciousness after a short period.

If your horse has never suffered from syncope, you have nothing to worry about. This is because there may be an abrupt fall in blood pressure that caused your hose to fall and not because of syncope.


Your horse may also fall after mating because of narcolepsy. Narcolepsy is a unique and incurable sleep disorder of the central nervous system. It is usually marked by sleep attacks at an unexpected time. This disorder is also typically accompanied by unmanageable loss of muscle tone.

This disorder usually manifests itself when the horse is groomed excessively, after mating, being fed, or when stroked. It can also occur during long periods of inactivity during the day.

However, it’s also vital to know that narcolepsy is susceptible in some horse breeds than others. Some of the horse breeds and are usually affected by narcolepsy are miniatures, shetlands, and Suffolk punches.

If you notice these signs before your horse falls, just know that it’s suffering from narcolepsy. They include rapid flicking from the eye from side to side, progressive lowering of the head, and partially closed eyes.

When Do Horses Mate?

The good thing about learning your horses’ mating behavior is that their mating season doesn’t last long. So, you will not have to keep a keen eye on your horse all year round. Horses typically mate spring and summer. Besides, horses love mating during the day and not at night.

Stallions usually erect up to 18 times a day and can mate for 2 to 3 times. The mares usually have an estrous cycle of around 21 days, followed by 3 to 7 days of heat. The horses do mate in spring or summer so that the foals will be born in the month where the survival rate is high.


Understanding your horse’s behavior will give you a better chance of managing them. When your horse falls after mating, it can mean that the horse has an underlying issue, or it’s just a normal response that horses show after copulation.

Stress, excitement, and hormones are other things that can cause your horse to fall after mating.

If your horse has an underlying problem, make sure to visit a veterinarian so that they can check up on your animal. Therefore, you should not panic when your horse falls after mating, as it’s a natural thing.