Here's a small thing that causes a surprising amount of confusion: menopause is one day, not a phase.
Technically, menopause is the point at which you've gone twelve full months without a period. That's it. One milestone, looking backwards. The average age is around 51, though anywhere from the mid-40s to mid-50s is common.
So what's the years-long experience everyone calls "the menopause"? That's mostly perimenopause — the transition leading up to that final period. Think of it as the runway, not the landing. It can run anywhere from a couple of years to a decade, and it's where most of the action happens: cycles shifting, hot flushes arriving, sleep fragmenting, moods swinging. Oestrogen and progesterone don't glide downhill in perimenopause. They lurch, spike, and dip unpredictably, and that turbulence is what drives so many of the symptoms.
Then comes postmenopause — every year after that twelve-month mark. Hormones settle at a new, lower, steadier level. Many of the rollercoaster symptoms ease here, though some changes that come from sustained low oestrogen (bone thinning, vaginal dryness) need ongoing attention.
A quick way to place yourself:
Why bother with the distinctions? Because they change the conversation. A blood test in perimenopause is often unhelpful (levels swing too much to pin down), whereas symptoms and cycle patterns tell the real story. Knowing your stage also helps you and your doctor weigh options sensibly.
Same journey, three different words. Now you know which one you're standing in.
Am I in perimenopause or menopause?
If your periods are still happening but changing, that's perimenopause. Menopause is the single point twelve months after your last period.
How long does perimenopause last before menopause?
Commonly four to eight years, though it varies widely from woman to woman.
Related reading: The first signs of perimenopause · How long symptoms last · Take the free Hormone Quiz