What Happens When Your Cat Is in Heat? When Does It Start? Important Things to Know and How to Cope

One concern for cat owners is their cat's "heat cycle."

Many owners feel anxious, not knowing when their cat's heat cycle will begin or what behaviors to expect during this time.

In this article, we'll consider what to watch out for during a cat's heat cycle and how to deal with problematic behaviors. We'll also provide an easy-to-understand explanation of the basics of spaying and neutering.

When does a cat's heat cycle begin?

A cat's heat cycle refers to the period when they seek out cats of the opposite sex for reproduction. This behavior comes from their instinct to procreate.

Cats are seasonal breeders, meaning they have specific breeding seasons within the year. Unlike dogs, they do not have periods (heats). Instead of ovulating at regular intervals, ovulation is triggered by mating.

When the breeding season arrives, female cats enter their heat cycle. Male cats are stimulated by the female cat's distinctive yowling and pheromones, causing them to go into heat.

So, when does the heat cycle begin? Let's learn about the age at which cats first go into heat and the seasons when they are in heat.

At what age does the first heat cycle usually occur?

Female cats typically experience their first heat cycle around 6–8 months of age, while male cats experience theirs around 7–12 months of age. Even if you still think of them as kittens, their bodies are already fully mature.

However, depending on the season they were born in and their environment, the heat cycle can start earlier. Conversely, some cats may start later, so there is significant individual variation.

When do cats go into heat?

Cats typically go into heat twice a year, with spring (February–April) and summer (June–August) being their breeding seasons.

Since a cat's gestation period is approximately two months, warm weather makes for a suitable birthing season. In warmer regions, some cats may even go into heat three times a year.

How long does a cat's heat cycle last?

A female cat's main heat cycle lasts about 1–2 weeks. If mating does not occur during this period, or if mating occurred but she did not become pregnant, she will go into heat again in 1–3 weeks.

What kind of behaviors occur during the heat cycle?

During the heat cycle, specific behaviors characteristic of this period begin.

The behaviors of female and male cats in heat differ. Let's learn about the behaviors that occur during the heat cycle.

Characteristics of a female cat's heat cycle

Female cats cycle through "proestrus" → "estrus" → "metestrus" → "anestrus."

・Proestrus

During proestrus, their activity gradually increases. They may urinate more frequently or become excessively affectionate towards their owners. This period lasts approximately one week.

・Estrus

This is the period when estrus truly begins, and the cat becomes ready to accept mating. As a sign of this, they start engaging in behaviors to attract male cats.

• Making loud noises such as "nyaa-own" or "gyaa-own"
• Urine spraying in various places to attract male cats
• Adopting a lordosis posture, raising their hindquarters high
• Rolling on the floor and wiggling their hips
• Attempting to escape outdoors

These estrus-specific behaviors last for about 4 days to 2 weeks.

・Metestrus

The problematic behaviors of estrus gradually decrease.

・Anestrus

Problematic behaviors subside, and the cat loses interest in male cats.

If mating does not occur during proestrus to metestrus, or if mating occurs but pregnancy does not follow, estrus will begin again in approximately 1–3 weeks.

Characteristics of a male cat's heat cycle

Male cats do not have a fixed heat cycle. They go into heat in response to the vocalizations and pheromones of female cats.

• Becoming restless
• Yowling loudly to announce their presence
• Urine spraying to mark their territory
• Becoming aggressive
• Attempting to escape outdoors

These problematic behaviors may become apparent.

How to deal with problematic behaviors during the heat cycle?

Yowling all night, becoming aggressive, trying to escape... While these are instinctive behaviors for cats, owners certainly want to stop these problematic behaviors.

However, scolding them or startling them with loud noises will not be effective. It will only cause them more stress, so avoid doing so.

Also, we do not recommend stimulating a female cat's genital area with a cotton swab to try to end the heat cycle prematurely. This is unsanitary and dangerous.

During the heat cycle, there is nothing to do but wait for it to subside naturally. However, there are ways to reduce stress for both the cat and the owner.

Play with them a lot

During the heat cycle, cats can be irritable and restless. To help them relieve stress, play with them a lot during the day.

It's important to be completely supportive of your cat's feelings, such as by adding more scratching posts or new toys.

However, toys containing catnip are a no-go. They can become too excited and aggressive, so avoid giving them such toys during their heat cycle.

Prevent them from seeing outside

Even cats kept exclusively indoors will experience a heat cycle. They can react to the sounds and pheromones of outdoor cats, so keep windows closed.

Blocking windows with thick curtains or cardboard can be even more effective.

Measures against urine spraying

Urine spraying in various places can be problematic, so placing pet sheets in areas where they are likely to mark will make cleaning easier.

This also prevents strong urine odors from lingering and prevents stimulating other cats in the household.

Thorough escape prevention measures

During the heat cycle, cats may impulsively try to go outside. It is crucial to lock all doors and windows and take extra precautions against escapes.

To be prepared for any eventuality, have your cat wear a cat collar and ID tag. Getting a microchip is also recommended for peace of mind.

Is spaying/neutering advisable?

Being in heat is a stressful experience for cats. It must be difficult to spend time feeling emotionally unstable and restless.

Furthermore, cats are highly prolific. They mature at six months of age and can become pregnant twice a year, leading to concerns about "hoarding collapse" if the number of kittens becomes unmanageable.

If you are not planning to breed, the benefits of spaying or neutering your cat are significant.

Benefits of spaying/neutering

Spaying or neutering can reduce problematic behaviors associated with the heat cycle. Additionally, it offers the benefit of preventing hormone-related illnesses such as:

• Mammary cancer
• Ovarian cancer
• Testicular cancer
• Pyometra (uterine infection)
• Prostatic hyperplasia (enlarged prostate)

Disadvantages of spaying/neutering

Surgery is performed under general anesthesia, which places a burden on the cat's body. Therefore, depending on the cat's health condition and age, spaying or neutering may not be possible.

While the surgery itself only takes a few tens of minutes, it still puts a strain on the cat's body.

Additionally, there is a risk that changes in hormone balance may increase appetite, leading to obesity.

Cost of spaying/neutering

Pet insurance does not cover spaying or neutering surgery.

Surgery costs vary by veterinary clinic, but typically range from 10,000 to 20,000 yen for male cats and 30,000 to 40,000 yen for female cats.

In addition, a recovery collar or post-surgical suit may be necessary.

Summary

Even the calmest cats can yowl with a different voice or become aggressive during their heat cycle.

The heat cycle is a lifelong occurrence unless spaying or neutering is performed. If you have no plans for breeding, we recommend spaying or neutering your cat before their first heat cycle.

Consult with your veterinarian.

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