Maybe your menstrual cycle is suddenly unpredictable. Maybe you’re waking up at night, feeling off emotionally or dealing with hot flashes you didn’t expect just yet. If this sounds familiar, you may be entering perimenopause. It’s a normal but often confusing transition that can catch many people off guard.

During this time, your body gradually produces less estrogen, which can affect everything from your cycle to your sleep and mood.

What Is Perimenopause?

Perimenopause is the gradual transition before menopause, when hormone levels begin to fluctuate and decline.

“This life phase is a little like puberty in reverse,” says Dr. Shannahan. “Your body is transitioning out of your reproductive years, and just like puberty, there are many hormone fluctuations.”

Menopause is officially diagnosed when you haven’t had a period for 12 consecutive months.

When Does Perimenopause Start?

Perimenopause most often begins in your 40s, but it can start earlier — even in your mid-30s — or later, into your 50s.

If menopause occurs before age 40, it’s considered premature menopause and may require additional evaluation.

What Are the Most Common Perimenopausal Symptoms?

The first sign is often a change in your menstrual cycle, such as irregular timing, or heavier or lighter periods.

Other common perimenopausal symptoms include:

• Hot flashes and night sweats
• Sleep disruptions
• Mood swings or irritability
• Difficulty concentrating or “brain fog”
• Vaginal dryness
• Decreased fertility

“While many people assume perimenopause is like a ball rolling down a hill, with steadily declining estrogen levels, for a while it is more like a flickering light switch,” says Dr. Shannahan. “This is why symptoms can be inconsistent and frustrating to pinpoint.”

Why Can Symptoms Affect Your Daily Life?

Hormonal changes during the menopause transition can affect multiple systems in your body — from brain function to metabolism.

For some people, symptoms are mild. For others, they can significantly affect daily life, including sleep, work performance and emotional health.

How Long Does Perimenopause Last?

The average length of perimenopause is about four years before menopause fully sets in, but it can be longer for some. The average age for menopause in the United States is 51.

“For some, perimenopause may last only a few months; for others, it can take up to seven years,” says Dr. Shannahan. “And while some women may experience minimal disruption to their lives, for others, symptoms can be very bothersome.”

Just because a family member had a difficult menopause doesn’t mean you will, she adds. Lifestyle factors like nutrition, movement and sleep can shape your experience.

Can You Still Get Pregnant?

Yes. Even if your cycles are irregular, ovulation can still occur.

“Until you are officially in menopause, it is important to use contraception if you do not want to become pregnant,” says Dr. Shannahan. “Birth control pills are a common option to address both perimenopause symptoms and contraception.”

She adds that hormone therapy used for menopause symptom management does not provide contraception, unless a progesterone intrauterine device (IUD) is part of the regimen.

Is There a Test for Perimenopause?

There’s no single test that diagnoses perimenopause.

Instead, clinicians consider your age, symptoms and changes in your menstrual cycle. Hormone tests are often unreliable due to fluctuations.

“To the frustration of many women, hormone tests may still show nonmenopausal levels during perimenopause, which is why many clinicians don’t order them,” says Dr. Shannahan. “If you do end up getting your hormone levels checked and they don’t reveal anything, you may still be in perimenopause. I always say, ‘You know your body best.’”

She also explains that if you do notice any new or changing symptoms, it’s important to get a full evaluation in case there’s something else going on in addition to — or instead of — perimenopause.

When Should You See a Physician?

Some changes are expected during perimenopause, but others should be evaluated.

Talk to your doctor if you experience:

• Very heavy bleeding
• Bleeding between periods
• Symptoms that interfere with your quality of life

What Treatments Are Available?

Treatment depends on your symptoms and overall health.

Options may include:

• Birth control pills to address systemic symptoms and provide contraception
• Hormone replacement therapy (HRT) to address systemic symptoms like hot flashes, night sweats and mood changes
• Low-dose vaginal estrogen for vaginal dryness and other vaginal symptoms
• Nonhormonal medications for hot flashes, sleep or mood changes
• Nonpharmaceutical approaches, such as acupuncture

“Perimenopause as a phase of life does not need to be ‘treated,’ despite what you might see online,” says Dr. Shannahan. “Women deserve to maintain their quality of life and have concerns addressed — and that is where treatment options come in. But if a woman is not experiencing any bothersome symptoms, that is completely normal. In that case, something like hormone replacement therapy may not be recommended.”

How Can You Manage Symptoms Naturally?

Lifestyle changes can make a meaningful difference in both symptoms and long-term health. These healthy habits include:

Support your bones and muscles

Declining estrogen increases your risk of osteoporosis, making it important to maintain bone strength.

• Add strength training to your routine.
• Try weight-bearing exercises like walking, jogging or hiking with a weighted vest.
• Stay physically active to protect bone density and muscle mass.
• Discuss with your physician whether calcium or vitamin D supplements are appropriate for you.

Eat well and stay active

• Eat a healthy diet rich in calcium, protein and whole foods.
• Maintain a consistent exercise routine.
• Prioritize sleep and stress management.

Reduce health risks

• Stop smoking.
• Avoid alcohol.
• Focus on preventive care, such as routine checkups and recommended screenings.

“Avoiding tobacco and alcohol can help decrease hot flashes, prevent mood swings, reduce age-related weight gain, and promote bone and heart health,” adds Dr. Shannahan.

Start With the Right Support

Perimenopause is a natural part of aging, but that doesn’t mean you have to struggle through it.

Perimenopause can affect women in so many ways, from sleep to mood to hot flashes,” says Dr. Shannahan. “But no woman should suffer through it. There are many ways to protect quality of life and overall health. Whether you are interested in hormonal or nonhormonal approaches, pharmaceutical or lifestyle, there are options. Find a provider who listens and understands your goals.”

Understanding what’s happening in your body — and taking steps to support it — can help you move through perimenopause with confidence and maintain your quality of life.