Can you test for perimenopause?

If you have arrived here after a fortnight of broken sleep, a period that turned up ten days early, and a growing suspicion that something has shifted — you probably want a test. Something that gives you a number and a straight answer.

The honest answer is that for most women, there isn't one. And that isn't a gap in the system. UK clinical guidance actively recommends against testing in the group most likely to be asking.

That sounds like bad news. It usually isn't, once you understand why.

The short version

• If you are 45 or over, UK guidance says perimenopause should be identified from your symptoms and your cycle — without blood tests.
• If you are 40 to 45, a blood test may be considered, alongside your symptoms.
• If you are under 40, testing matters, and it is done differently and more carefully.
• Home menopause test kits measure a hormone that swings too much during perimenopause to tell you much.

Why the blood test doesn't work

The test people mean when they say "a menopause test" measures follicle-stimulating hormone — FSH. As the ovaries wind down, FSH tends to rise, so in principle a high reading suggests you're further along.

The problem is what FSH does in perimenopause specifically. It doesn't climb in a tidy line. It fluctuates considerably over short periods, which means a single blood sample tells you what your body was doing on Tuesday morning and very little about the transition you're actually in. You can have textbook perimenopausal symptoms and a completely normal FSH result, because you happened to test on a low day.

So the test isn't broken. It's measuring a moving target, and reporting one frame of it.

What UK guidance actually says

The relevant document is NICE guideline NG23, Menopause: identification and management, first published in 2015 and last updated on 15 April 2026. It sets out three age bands.

If you are 45 or over. NICE says to identify perimenopause without laboratory tests in otherwise healthy women who have menopause-associated symptoms — specifically, if you have vasomotor symptoms (hot flushes and sweats) that have recently started, along with any changes in your menstrual cycle. Menopause itself is identified when you have not had a period for at least 12 months and are not using hormonal contraception.

NICE also lists tests that should not be used to identify perimenopause or menopause in this age group: anti-Müllerian hormone, inhibin A, inhibin B, oestradiol, antral follicle count and ovarian volume.

If you are 40 to 45. NICE says an FSH level may be considered to confirm menopause in people of this age who have menopause-associated symptoms including a change in their menstrual cycle. Considered — not required.

If you are under 40. This is where testing genuinely matters. Menopause before 40 is called premature ovarian insufficiency, and NICE is explicit that it should not be diagnosed on a single blood test: diagnosis rests on symptoms including absent or infrequent periods, together with raised FSH on two blood samples taken four to six weeks apart. If you are under 40 and your periods have changed significantly, this is a see-your-GP situation rather than a wait-and-see one.

One more thing NICE flags: an FSH test should not be used to identify menopause in anyone taking combined oestrogen and progestogen contraception, or high-dose progestogen. Those medications affect the reading.

Worth noting the language, too. NICE now talks about identifying perimenopause rather than diagnosing it. That's not pedantry — it reflects that this is a life stage recognised from a pattern, not a disease detected by an assay.

What about home test kits?

You can buy kits that measure FSH in urine or a finger-prick sample, and they will give you a number.

The difficulty is the same one the GP's blood test has, minus the context. During perimenopause FSH swings; a kit captures one point in that swing. A result in the normal range doesn't mean you're not perimenopausal, and a raised result doesn't confirm that you are. If you're on hormonal contraception, the reading is affected anyway.

There is also the question of what you'd do with the answer. If the kit says "high", you still have to take your symptoms to a GP. If it says "normal" and you feel dreadful, you still have to take your symptoms to a GP — but now with a piece of paper that might make you doubt yourself. That is the real cost, and it's the reason to be sceptical of anything sold on the promise of certainty here.

So what does get you an answer?

Your own record. Which is less satisfying than a number, and considerably more useful.

NICE's list of menopause-associated symptoms includes changes in the menstrual cycle, vasomotor symptoms (hot flushes and sweats), genitourinary symptoms such as vaginal dryness, effects on mood, musculoskeletal symptoms such as joint and muscle pain, and sexual difficulties such as low desire.

What a GP is looking for is the pattern — which symptoms, starting when, and what your cycle has been doing alongside them. Most of us are hopeless at reconstructing that from memory in a ten-minute appointment. Three months of rough notes changes the conversation entirely: cycle lengths, the nights you didn't sleep, when the flushes started, when your mood dropped.

That's not a workaround for the absence of a test. Under current guidance, for women over 45, it is the diagnostic method.

When to book an appointment

Go and see someone if your symptoms are affecting your daily life, if you are under 45 and your periods have changed significantly, or if you're unsure whether what you're experiencing is perimenopause at all. A home kit can't tell you whether something else is going on; a GP can consider that properly.

One practical point that catches people out: not being "in menopause yet" has consequences for contraception. NICE specifically directs clinicians to share contraception information with people who have menopause-associated symptoms, pointing to the Faculty of Sexual and Reproductive Healthcare's guidance for women over 40. If your periods have become erratic and you have assumed that settles the question, it doesn't — worth raising at the same appointment.

The uncomfortable bit

A lot of women arrive at perimenopause wanting confirmation before they're willing to take their own symptoms seriously — and there's a whole market happy to sell that confirmation as a number in an email.

The guidance is asking you to do something harder: to trust a pattern rather than a result. If you're over 45 and your cycle has changed and the flushes have started, you have what NICE considers sufficient information. You are allowed to act on that.