The stages of perimenopause, in order

What are the stages of perimenopause, in order?

In the order your body actually moves through them, here's the full staged model researchers use, from the first subtle shift to the far side of menopause:

• Early perimenopause — cycle length starts varying by seven or more days from one cycle to the next, on a persistent basis.
• Late perimenopause — cycles have started skipping outright, with stretches of 60 or more days between periods.
• Menopause — a single point in time, not a stage with a duration: the day that becomes official once 12 full months have passed with no period at all.
• Early postmenopause — the first several years immediately after that 12-month mark, while hormone levels are still settling.
• Late postmenopause — everything after that settling period, for the rest of life.

Notice what's doing the defining at every step: cycle length and bleeding patterns, not how tired you feel or how hot a hot flash was. That's deliberate. Symptoms are real and worth tracking for your own sake, but they're too variable person to person to serve as a staging criterion. Your calendar is the more reliable instrument here, which is actually good news, because it means you don't need a lab visit to make a reasonable guess at where you are.

Is STRAW+10 the same thing as the "seven stages of perimenopause"?

Not quite, and this is worth untangling because the mismatch causes real confusion. The model clinicians actually use is called STRAW+10, short for the Stages of Reproductive Aging Workshop, updated in 2011 and published as an executive summary in 2012 (Harlow et al.), simultaneously in three journals including Climacteric, Menopause, and Fertility and Sterility. It's the staging framework endorsed by researchers and used across menopause medicine.

STRAW+10 covers the entire reproductive lifespan, not just perimenopause: the reproductive years (split into early, peak, and late substages), then early and late perimenopause, then the final period itself as a boundary point, then early and late postmenopause. Depending on whether you count the final-period boundary as its own numbered stage, that full lifespan model works out to roughly seven or eight numbered stages — which is almost certainly where the popular "seven stages of perimenopause" phrasing borrowed its number from. But that count describes the whole model, from your 20s or 30s all the way through late life. Perimenopause itself, in STRAW+10 terms, is only two of those stages: early and late. Everything else in the popular "seven stages" framing is really describing the years before perimenopause even starts, or the postmenopausal decades after it ends.

Stage one: early perimenopause, defined by your cycle, not your symptoms

Early perimenopause has a specific, almost unglamorous definition: a persistent difference of seven days or more in the length of consecutive menstrual cycles. Not a single odd month — a pattern. If your cycle ran a fairly steady 28 days for years and is now landing anywhere from 24 to 33 days, cycle after cycle, that variability is the marker itself, not a side effect to look past on the way to some other symptom.

Hormonally, this is the stage where FSH (follicle-stimulating hormone) starts climbing and fluctuating, though it's still far too erratic to pin down with one blood draw. An occasional skipped period can happen here too, but you haven't yet crossed into the 60-plus-day gaps that define the next stage. Most women spend the majority of their total transition in this stage rather than the next one — the full timeline is covered separately if you want the how-long-does-this-take version rather than the what-defines-it version you're reading now.

Stage two: late perimenopause, once periods start skipping for real

Late perimenopause has its own clean threshold: an interval of amenorrhea, meaning no period at all, lasting 60 days or longer. That's the line between early and late in this model — not "periods are more irregular than before," but a specific gap of two months or more with nothing happening.

FSH tends to run higher here too, commonly climbing above 25 IU/L on a random draw, though even that number still isn't reliable enough on its own to declare a stage with certainty — hormone levels in this window can swing hard from one week to the next. This stage is shorter than the one before it, typically running about one to three years before the final period arrives, and it's also, unhelpfully, the stretch where symptoms like hot flashes and disrupted sleep tend to intensify the most for a lot of women.

How do you know which stage you're in right now?

Realistically, this comes down to a question you can answer for yourself: is your period still showing up, just at unpredictable intervals, or has it been gone for two months or longer? If it's the first, you're most likely in early perimenopause. If it's the second, you're most likely in late perimenopause, closer to the end of the transition than the beginning.

A few stray irregular cycles here and there, without a real pattern, isn't enough on its own to call it early perimenopause under this model — it's the persistence across consecutive cycles that matters. If you're genuinely unsure whether what you're seeing counts, tracking two or three cycles on a calendar or period app, rather than relying on memory, usually settles it.

What actually happens at the menopause stage itself?

Menopause, in this model, isn't really a stage at all — it's a single point that closes out late perimenopause and opens postmenopause. You don't feel it arrive. You only know you've reached it by counting backward once a full 12 months have passed without any bleeding, at which point that date becomes official retroactively. Any bleeding at all after that 12-month mark has already been reached is its own separate concern, not a sign the count was wrong, and it's worth a prompt call to a doctor rather than an assumption.

That boundary, and what actually shifts hormonally once you cross it, is covered in full in the perimenopause vs. menopause guide — this page is focused on the staging model itself rather than re-explaining that ground.

Postmenopause has its own early and late stages, too

Yes, and it's worth knowing this exists, because postmenopause isn't a single flat stage that starts once and stays the same forever. STRAW+10 splits it into early and late postmenopause. Early postmenopause covers roughly the first several years right after your final period is confirmed, commonly estimated at somewhere in the five-to-eight-year range. Researchers subdivide it further into three finer sub-stages: the first year after confirmation, a following year where FSH and estradiol are still shifting fairly rapidly, and then a longer stabilization window.

Late postmenopause begins once hormone levels have settled into that low, steady baseline, and it covers the rest of life from there. Ongoing changes in this stage are driven more by general aging, like bone density and cardiovascular shifts, than by hormonal fluctuation, since the erratic swinging that defined perimenopause is long over by this point. Most patient-facing guidance simplifies all of this to just "early" and "late" postmenopause without walking through the finer sub-stages — which is a reasonable amount of detail for day-to-day purposes, even though researchers track it more precisely.

Can a hormone test just tell you your exact stage?

Not reliably, and this trips a lot of women up because it seems like it should. FSH and estradiol both swing too much within the same week for a single blood draw to lock in a stage with confidence — the same person can post a late-perimenopause-range number one week and an early-perimenopause-range number the next, without anything having actually changed. That's why cycle pattern, not a lab value, is the primary criterion in the staging model itself.

Testing still has a real role: it can support what your cycle is already telling you, and it rules out look-alike conditions like thyroid disease. The full breakdown of what each test can and can't tell you covers that in the depth it deserves, including exactly when a hormone panel is actually worth ordering.

Does any of this apply if you've had a hysterectomy or use hormonal birth control?

Not cleanly, and it's worth saying so directly rather than pretending the model stretches to cover every situation. STRAW+10's staging criteria are built entirely around menstrual bleeding patterns, so anything that removes periods as a reliable signal breaks the model's main tool.

• Hysterectomy with ovaries left in place — your ovaries keep going through the same underlying hormonal transition on roughly its usual schedule, but there are no periods left to track, so cycle-length and amenorrhea criteria simply don't apply.
• Hormonal IUD — periods are often lighter, irregular, or absent by design, which can mask the very changes the staging criteria are looking for.
• Combined hormonal birth control — the pill, patch, or ring impose their own regular bleeding pattern on top of whatever your ovaries are actually doing, so a normal-looking cycle doesn't rule perimenopause in or out.
• Both ovaries surgically removed — this ends any gradual transition immediately rather than staging through it; postmenopause starts right away, from a known surgical date, rather than being reached gradually.

In any of these situations, symptoms like hot flashes, sleep disruption, and mood changes become the more useful signal, alongside age and, where relevant, a clinician's read on your hormone pattern over time rather than a single test.