Stage guide

Signs perimenopause is ending

Perimenopause ends, and you reach menopause, when you have not had a period for 12 months: that is the NHS definition, and there is no test that gives you the date in advance. In late perimenopause the typical pattern is periods spacing further apart and becoming less frequent before stopping, while symptoms may shift in intensity. Menopause usually happens between 45 and 55. This is information, not medical advice.

The 12-month rule

There is no moment during perimenopause when a switch flips. The definition is retrospective: the NHS describes menopause as the point when you have not had a period for 12 months, usually between the ages of 45 and 55. Everything before that, while you still have periods but symptoms have started, is perimenopause; everything after is postmenopause. So "perimenopause ending" is only ever confirmed looking back, 12 months after what turns out to have been your final period.

What late perimenopause typically looks like

The most reliable signal is your cycle. Early perimenopause tends to bring changes in regularity, flow or cycle length; in the later stage, gaps between periods usually stretch out, with months missed at a time before periods stop altogether. Symptoms do not follow one script: some women find hot flushes and night sweats peak around the final period, while sleep, mood and brain fog patterns vary widely. The widely shared list of 34 perimenopause symptoms mixes well-evidenced symptoms with weakly evidenced ones, so treat symptom checklists as a prompt for a GP conversation, not a diagnosis.

Why a hormone test will not give you the answer

NICE guidance (NG23) says that in women over 45 with typical symptoms, perimenopause and menopause should normally be diagnosed from symptoms and period pattern alone, without blood tests. Hormone levels, including FSH, fluctuate sharply through perimenopause, so a single reading can look "menopausal" one month and not the next. Testing has a place in younger women, particularly under 40, where premature ovarian insufficiency needs to be considered; that is a GP-led process.

After the final period

Postmenopause is not simply the end of symptoms. The NHS notes symptoms can last several years, and some, such as vaginal dryness, can persist or start later. Two practical points matter in this window. Contraception: the NHS advises it is still needed for 2 years after your last period if you are under 50, and for 1 year if you are over 50. And any bleeding once you have gone 12 months without a period should be checked by a GP; it is usually benign but is not part of the normal transition. Longer term, lower oestrogen is linked to faster bone loss, which is why activity, vitamin D and dietary calcium get more important from here.

Where this leaves supplements

No supplement changes when perimenopause ends, and none is authorised to claim it treats the transition. What the evidence supports at this stage is the boring foundation: vitamin D for normal bones (the NHS advises a 10 mcg daily supplement in autumn and winter), enough protein to maintain muscle, and getting persistent symptoms in front of a GP, where options including HRT can be weighed properly. Our supplements for menopause guide grades the popular products against that evidence bar.

Sources

Frequently asked questions

How do I know perimenopause is coming to an end?

The clearest sign is your periods: in late perimenopause they typically become further apart and less frequent before stopping altogether. Perimenopause ends, and you reach menopause, when you have not had a period for 12 months. There is no test that tells you the date in advance; the 12-month rule is how the NHS defines it.

Do I need a blood test to confirm menopause?

Usually not. NICE guidance (NG23) says menopause and perimenopause should normally be diagnosed in women over 45 based on symptoms and period changes alone, without laboratory tests. Hormone levels swing widely during perimenopause, which is why a single FSH blood test is not a reliable answer at this age. Testing is considered in younger women, for example under 45 or under 40, where the picture is different.

Do symptoms stop when periods stop?

Not always immediately. The NHS notes menopause symptoms can last for several years and vary a lot between women; some symptoms ease after the final period while others, such as vaginal dryness, can persist or appear later. If symptoms are affecting your life at any stage, that is worth a GP conversation rather than waiting for them to pass.

What if I bleed after 12 months without a period?

See your GP. Bleeding after menopause, meaning any vaginal bleeding once you have gone 12 months without a period, is not part of the normal transition and the NHS advises getting it checked. It usually has a benign explanation, but it needs to be looked at.

This is information, not medical advice, and is not a substitute for a registered clinician. For the stage before this one, see the perimenopause symptoms hub; for what comes with it, the menopause symptoms hub and menopause guide.

OM

Oliver Mackman

Editor, Her Vitals

Oliver leads Her Vitals's editorial coverage of women's life-stage health and supplements. He curates and reviews existing branded products across trying to conceive, pregnancy, postnatal, perimenopause, menopause and the senior years, weighing what the evidence supports against guidance from bodies such as EFSA, the NHS and NICE, and is clear that the content is information rather than medical advice.

Last reviewed: 19 July 2026

Reviewed by Oliver Mackman, Editor. Editorial review against published guidance; not a clinical review.