Perimenopause test: is there one, and which checks are worth having?

Is there a perimenopause test that gives a yes or no?

No. A perimenopause test with a clean yes or no doesn't exist, which is why the most useful record is a free one: the dates of your periods, plus hot flashes, sleep and mood, written down as they happen.

The dates matter because the pattern is the evidence. In late perimenopause, gaps between periods can reach 60 days or more (The Menopause Society), and menopause is only confirmed looking back, after 12 months without a period (NHS). If you're unsure what counts as a symptom, perimenopause symptoms lists what tends to change.

Testing has a second job, which is a baseline. Before you change how you eat or train, whether that's lifting heavier or reading up on intermittent fasting for women, it helps to know your numbers, so you can see what your trial and error is actually doing.

For the years before this one, fertility by age covers the checks of the reproductive years, and for the years after, the menopause test page picks up where this one stops. The full list for every stage is in health checks for women.

Check, when, what to look for

Which blood tests are worth having in perimenopause?

The blood tests worth having are the ones that rule out other causes and track midlife risks, rather than a hormone panel: thyroid (TSH), ferritin with a blood count, HbA1c, a lipid panel and vitamin D. The checks table sets out the timing for each.

Thyroid is the one many women find most worth ruling out, since its symptoms overlap with perimenopause. Vitamin D is a once, then as advised test, and the NIH Office of Dietary Supplements treats under 20 ng/mL (50 nmol/L) as low. The UK doesn't always use the same cut-off, so it's worth asking your GP how your lab reads the result.

Iron is the test to think about if your periods are heavy. The NIH Office of Dietary Supplements puts a ferritin under 30 ng/mL at low stores, and a low result opens the conversation about iron deficiency anemia treatment with your doctor.

Bone density mostly waits. For osteoporosis, the USPSTF (2025) takes a risk-first route for women who are postmenopausal and under 65: check for risk factors such as low body weight, a parent's hip fracture, smoking or heavy drinking, assess clinical risk, and scan only if risk is raised.

Your cycle is data too, and irregular periods are worth logging with dates. If they stop much sooner than you expected, early menopause is worth a conversation, since it brings bone checks forward. Heavy and irregular together make ferritin the test to ask for by name, and the bone scan itself is a DEXA scan, which reports a T-score.

Which screenings and checks are due during perimenopause?

Three cancer screenings and a set of heart and metabolic checks are due, or coming due, in these years. In the US a mammogram is advised every 2 years from 40, while the UK schedule is every 3 years from 50 to 71. Colorectal screening starts from 45 in the US and from 50 in the UK, with a stool test (FIT) or a colonoscopy. Cervical screening is every 5 years with an HPV test, or every 3 years with a Pap smear, and it continues until about 65. In the UK these arrive by NHS invitation, and the intervals differ, so your letter is the schedule to follow.

The heart and metabolic checks are where many women find the best value. Normal blood pressure for women is worth knowing, and a home monitor makes yearly checks easy. HbA1c shows blood sugar, a tape measure gives your waist to height ratio, and the guide to high cholesterol symptoms in women explains the lipid panel, which is how raised cholesterol is actually found.

The easiest way to get all this done is to bundle it. A well woman exam is a natural place to ask what's due, and it's worth bringing your family history, including anything that makes breast cancer genetic screening worth asking about.

Your symptom diary belongs at that appointment as well, because it informs the treatment conversation, HRT included, and it's the place to note any perimenopause contraception you use. In the UK, your GP can say which blood tests the NHS offers and which would be private.

Next steps

Here's a simple order. Start a symptom diary today, with cycle dates, hot flashes, sleep and mood. Go through the checks table and mark what you've had and what's overdue. Then book one appointment and bring both. If you're unsure where you are, our which stage am I in tool is a quick place to start. Many women find it sensible to see a doctor promptly for any of the red flags on this page, without waiting for a routine check. And be kind to yourself: the schedules are a starting point, your history and risks are your own, and this is not one size fits all, so you decide, with your doctor, which checks fit you.