Which stage am I in? The perimenopause stage finder
This stage finder, the tool inside our perimenopause test page, sorts your period pattern into one of four likely stages: early perimenopause, late perimenopause, menopause or postmenopause. The earliest clue is usually a change in your periods, according to the NHS (2024), and cycle length that varies by 7 days or more is the pattern The Menopause Society (2024) describes as the transition gets going.
What does the stage finder ask? Three things: how your periods have behaved lately, how long it has been since your last one, and which symptoms you notice. Of the three, the period dates do the heavy lifting. I'm in perimenopause myself, and my honest opinion is that dates beat memory, which is generous about what counts as "regular".
How does the finder decide my stage? It borrows the pattern The Menopause Society (2024) describes for perimenopause. The cycle shift above, with no long gaps, comes back as early perimenopause. A skipped stretch of 60 days or more moves the result to late perimenopause. Menopause is confirmed 1 year after your final period, so a full year without one reads as menopause reached, and everything after that is postmenopause.
What does a result look like? A stage plus the reason for it. For example: "Likely late perimenopause: your last period was more than 60 days ago, but less than a year." Your symptoms are shown beside the result as context; they don't change the stage, because the cycle is the clearer signal.
What can't the finder tell me? It can't confirm a stage, because it reads timing and symptoms only, so it is not a diagnosis. Flow can change too, heavier or lighter, and a single unusual month says little on its own. The Menopause Society suggests tracking bleeding on a calendar or smartphone app, which gives the finder better answers to work with.
What should I do with the result? The most effective use is as a conversation starter: the stage, the reason and your dates give an appointment something specific to work from. Many women find it helpful to run it again when the pattern shifts, such as a first long gap. Our other tools pick up from there.
Common questions
Which symptoms should I note alongside my periods?
Hot flashes (hot flushes in the UK) and night sweats are the most commonly reported symptoms of the menopause transition, according to The Menopause Society (2024); the NHS lists hot flushes first too, without ranking them. The NHS also notes that Black women are more likely to have severe hot flushes that last longer. More are on our perimenopause symptoms page.
How long does perimenopause last?
Years, not months. The UK's NHS (2024) says perimenopause and menopause symptoms usually last 7 to 9 years, sometimes longer, and they can change over that time. The Menopause Society in the US gives no fixed length and describes the stage by cycle changes instead.
Does my age decide my stage?
"You're too young for that" is a classic piece of outdated advice, and the pattern doesn't back it. In the UK, the NHS (2024) says menopause usually affects women between 45 and 55 but can happen earlier; in the US, The Menopause Society (2024) describes perimenopause by what your cycle does, not by a birthday. So the finder treats age as context and sorts by periods.
When should I see a doctor instead of relying on a tool?
A few things are worth an appointment whatever the finder says: any bleeding 12 months or more after your last period; bleeding so heavy you feel faint, dizzy or constantly tired (a ferritin test is a reasonable thing to ask for); a new breast lump or any breast change; new or changing moles; and unexplained weight loss. The Menopause Society (2024) advises taking bleeding changes to a healthcare professional, which means your OB-GYN in the US or your GP in the UK.
Next steps
A lovely first step is to start that record of period dates today, then run the finder with it beside you. If the result raises questions, or any sign in the last answer above sounds familiar, your OB-GYN or GP is a good person to take it to. What fits you may look different from what fits a friend, so what you do next is yours to decide: it is not one size fits all.
Sources
The guidelines and studies this page draws on.
- Menopause (overview), NHS (2024)
- Menopause symptoms, NHS (2024)
- Perimenopause (patient education), The Menopause Society (2024)