A blood test can't confirm perimenopause in most women over 45. FSH and oestradiol swing from day to day in perimenopause, so a result can look normal one week and menopausal the next. Diagnosis rests on your age, symptoms and cycle changes. Blood tests are most useful for ruling out other causes of the same symptoms, such as low iron and thyroid problems.
If you are in your 40s with patchy sleep, heavier or less predictable periods, hot flushes or a foggy head, it makes sense to want a test that gives a clear answer. For perimenopause, a single hormone result usually can't give one.
This guide explains why, when hormone tests do help, and which blood tests are worth doing in your 40s because they catch the conditions that look like perimenopause and the changes it brings to your heart and metabolic health.
The Baseline Health Check covers 70+ markers, including iron studies, thyroid, blood sugar, insulin and cholesterol, the tests that rule out perimenopause look-alikes and track midlife changes.
For most women over 45, no. The Australasian Menopause Society advises against hormone tests in women with symptoms at the usual age for menopause, because FSH and oestradiol fluctuate daily and the result rarely changes what happens next.
In perimenopause the ovaries don't wind down smoothly. Some cycles you ovulate and some you don't. Oestradiol can spike higher than in your 30s, then drop. FSH can be high one week and normal the next. A single blood test captures one day of that, and a woman can have a menopausal-looking result and still ovulate days later.
Perimenopause is diagnosed on the pattern: your age, changes to your cycle, and symptoms such as hot flushes, night sweats, poor sleep, mood changes and brain fog. It lasts on average four to eight years.
Hormone tests are useful in specific situations:
If you are on the combined pill or menopausal hormone therapy, hormone tests are especially unhelpful, because the medicine sets your levels.
The most useful blood tests in your 40s check for conditions that cause the same symptoms, and for the changes perimenopause brings to your heart and metabolism.
| Test | Why it matters in perimenopause |
|---|---|
| Ferritin and iron studies | Heavier periods are common in perimenopause and drain iron. Low iron causes tiredness, poor sleep and brain fog |
| TSH | An underactive or overactive thyroid can mimic perimenopause: fatigue, weight change, mood, cycle changes |
| Full blood count and haemoglobin | Checks for anaemia, especially with heavy bleeding |
| Fasting glucose, HbA1c and fasting insulin | Insulin sensitivity often falls through the transition, and weight shifts to the middle |
| LDL cholesterol and other lipids | LDL cholesterol rises around the final period, independent of age |
The Australasian Menopause Society lists a blood count, iron studies and TSH as the tests that help exclude perimenopause look-alikes. The US SWAN study found LDL cholesterol and apolipoprotein B rise sharply in the year or two around the final menstrual period, which is why perimenopause is a good time to know your numbers. Our article on perimenopause and glucose sensitivity covers the blood sugar side in more detail.
An FSH above about 25 to 30 IU/L on day 2 to 5 is often described as "in the menopausal range", but in perimenopause it doesn't confirm anything on its own. FSH can be high in one cycle and back in the normal range the next. Your report's reference ranges for FSH depend on your cycle phase and are listed by your lab.
One high FSH doesn't mean you can stop contraception. You can still ovulate and get pregnant during perimenopause.
AMH (anti-Müllerian hormone) falls as egg numbers decline and is very low near menopause. The Australasian Menopause Society doesn't recommend routine AMH testing to predict when menopause will happen, because the timing can't be pinned down from it. Vively doesn't currently offer AMH testing. If you have had it done, our guide to AMH levels explains your result.
Start with the Baseline Health Check. It covers iron, thyroid, blood sugar, insulin and cholesterol, which are the tests the guidelines point to in your 40s.
The Perimenopause Hormone Test measures oestradiol, FSH, LH and progesterone at two points in one cycle, along with androgens, prolactin, thyroid and fasting insulin. It shows how your hormones moved across that cycle, including whether you ovulated. It can be useful if you are under 45, if your cycles have become hard to read, or if your GP wants a cycle picture. It can't confirm perimenopause on its own or tell you when your periods will stop.
For more on each hormone and how to time your tests, see our guide to women's hormone blood tests.
See your GP if your periods stop or become irregular before 40, if you have very heavy bleeding, bleeding between periods or after sex, or periods closer than three weeks apart. The Australasian Menopause Society advises that women over 40 with heavy or frequent bleeding be investigated. Also see your GP if symptoms are affecting your work, sleep or relationships. Menopausal hormone therapy and non-hormonal options work well for many women, and a GP can talk them through with you.
You order online, and our GP network reviews and signs the pathology request. You have one blood draw at one of our 4,000+ accredited partner collection centres, and results arrive in the Vively app, usually within a few days. A Vively practitioner talks you through them alongside your cycle and symptoms, and you retest to see how things change. Vively doesn't replace your GP for diagnosis or menopause treatment. Start with your Baseline.
For most women over 45, no. FSH and oestradiol fluctuate from day to day in perimenopause, so one result can't confirm it. Perimenopause is diagnosed on your age, cycle changes and symptoms. Blood tests are most useful for ruling out other causes, such as low iron or thyroid problems.
There isn't one. FSH rises and falls unpredictably in perimenopause, so a high result one month can be normal the next. Repeated high FSH with low oestradiol helps diagnose early menopause in women under 40 to 45. Over 45, guidelines advise against relying on FSH.
Iron studies and ferritin, TSH, a full blood count, fasting glucose, HbA1c, fasting insulin and cholesterol. These rule out conditions that mimic perimenopause and track the rise in LDL cholesterol and insulin resistance that often comes with it. The Vively Baseline Health Check covers these.
Because Australian menopause guidelines advise against hormone tests in women over 45 with typical symptoms. The results fluctuate too much to change the diagnosis or treatment. Your GP may still test iron, thyroid and other markers to rule out look-alike conditions.
Many blood tests can be Medicare-funded when a doctor orders them for a clinical reason. With Vively, the Baseline Health Check can attract a Medicare rebate after a short telehealth GP consult. The Perimenopause Hormone Test is a private add-on with no rebate.
Yes. You can still ovulate in some cycles, even with a high FSH result. Keep using contraception until your doctor advises you can stop, usually 12 months after your last period if you are over 50, or 24 months if you are under 50.
Vively supports preventative health and health optimisation. It does not replace your GP, emergency care or specialist medical advice.
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