How long does perimenopause last?

Day one. I found my keys in the fridge. Day four, three a.m., soaked. Day nine, my heart took off at my desk. I thought I was falling apart.

She wasn't. She was in perimenopause, and almost nobody had explained it to her. Let's fix that. Six minutes: what it is, what it feels like, how long it lasts, how it's diagnosed, and what helps.

Perimenopause is the transition to menopause. Menopause itself is a single point: twelve months after your last period. Everything before it, the years when your hormones start to change, is perimenopause.

Most people picture estrogen sliding down a gentle slope. In perimenopause it doesn't slide. It swings. Some months it drops, some months it spikes higher than it did in your thirties, while progesterone tends to fall. That rollercoaster, not a slow decline, is behind a lot of what women feel.

For most women, menopause arrives between forty-five and fifty-five. Perimenopause starts years before that, often in the early or mid forties.

Doctors describe it in stages. In the early transition, the length of your cycle keeps changing by seven days or more from one month to the next. In the late transition, you go sixty days or more without a period, and that stage usually lasts one to three years.

Hot flashes are the famous one. Between fifty and seventy-five percent of women get hot flashes or night sweats during the transition. They're far from the only one.

Across sixteen studies, seventy-one percent of women in perimenopause reported joint or muscle pain.

In SWAN, the large American study that followed women through the transition, about half had a moderate or high chance of palpitations during perimenopause.

Women with no history of depression were more than four times as likely to have high depressive symptom scores during the transition as before it.

And memory: in SWAN, women learned new information less well during perimenopause, then bounced back after menopause.

Add broken sleep, itchy skin, a dry mouth, rage over a spoon. Each one gets blamed on stress, age or a busy life. Put them side by side, and a pattern appears.

The other side matters too. In SWAN, about one in five women started out with almost no symptoms. There is no single normal.

This is the part women are rarely told. In SWAN, frequent hot flashes lasted a median of seven point four years in total, and went on for a median of four and a half years after the final period.

Women whose hot flashes started early, while periods were still regular or just beginning to change, had the longest course: a median of more than eleven point eight years. African American women had a median of ten point one years.

So "it'll pass in a few months" is, for many women, simply not true. That's exactly why waiting it out shouldn't be the only plan.

Here's what surprises people. For women forty-five and over, UK guidelines say perimenopause can be identified from your symptoms and your cycle changes, without a blood test.

That's because hormone levels swing from day to day in the transition. A normal FSH result one week says little about the next.

There are exceptions. Under forty-five, and especially under forty, a doctor may use blood tests to look for other causes, including premature ovarian insufficiency. And because about one in eight women develops a thyroid problem, which can look a lot like perimenopause, a simple TSH test is often worth doing.

The most useful thing you can bring to an appointment is a record: your cycle dates, your main symptoms, and when they happen.

For hot flashes and night sweats, hormone therapy is the most effective option. Estrogen cuts how often hot flashes happen by about seventy-five percent. For healthy women under sixty, or within ten years of their last period, the Menopause Society finds the benefits generally outweigh the risks.

If hormones aren't right for you, there are non-hormonal medicines. Fezolinetant works directly on the brain's thermostat. Certain antidepressants, in low doses, reduce hot flashes by roughly forty to sixty-five percent.

For sleep, cognitive behavioral therapy for insomnia has strong evidence. In a trial of women with hot flashes, eighty-four percent were in the no-insomnia range six months later, compared with forty-three percent who got education alone.

None of this means everyone needs medicine. It means there are options, and they're worth a real conversation with your doctor.

A few things need a doctor soon, whatever your stage. Any bleeding twelve months or more after your last period. Palpitations with chest pain, breathlessness or fainting: that's an emergency, call 911. And periods that stop or turn irregular before forty.

Mae's turning point wasn't a test. It was someone finally putting her symptoms side by side. You can start that today. Find your stage in two minutes at perimenostage.com, and take what you learn to your doctor.

Nobody had told me. Now somebody has.