Menopause and your hormones: which blood test gives insight

Thinking about testing your hormones during menopause? Start here: the transition is rarely pinned down by a single blood value. In the Netherlands the last period falls around age 51 on average, and the years before it your hormones can swing a lot. A blood test can sometimes help, but your symptoms and your cycle often say more.

My take after reading a lot of hormone results: people expect too much from one measurement. A single FSH value on a random day tells you little in perimenopause, because it jumps from cycle to cycle.

Below I lay out what changes in your hormones, around what age it happens, and when a blood test actually earns its place.

What happens to your hormones during menopause?

During the transition your ovaries gradually make less estrogen. Your brain responds by releasing more FSH, the hormone that drives the ovaries. That shift explains many of the symptoms women report in these years, from hot flushes to broken sleep.

It doesn't move in a straight line. Estrogen can be almost normal one month and low the next. That wave is exactly what makes a single measurement unreliable.

Researchers describe the transition as a series of stages, from the late fertile years to after the final period. Across those stages FSH tends to rise and estradiol to fall while your cycle becomes irregular. That pattern is set out in the international STRAW+10 framework.

Besides estrogen and FSH, LH and progesterone play a part too. Progesterone often falls first, because ovulation becomes more irregular. That partly explains why your cycle can change before the hot flushes begin.

What's the difference between perimenopause, menopause and postmenopause?

These three words are often used interchangeably, while they mark different stages. It helps to separate them, because your symptoms and your hormones belong to a particular stage.

Perimenopause is the run-up: you still menstruate, but your cycle and hormones are already changing. Menopause is strictly your very last period, a moment you can only confirm afterwards. Twelve months without a period means you've passed that line.

After that comes postmenopause, the years after your last period. Some symptoms ease then, while others, such as vaginal dryness, can persist. In everyday speech we call this whole journey "menopause". For more on the run-up, read recognising perimenopause.

At what age does menopause start?

For most women the transition starts somewhere between 45 and 55, with the final period around 51 on average. Perimenopause, the years with the first changes, can begin four to ten years earlier. So there is no fixed starting point.

Sometimes it starts earlier. In some women the first signs appear around age 40. If menopause arrives before 40, doctors call it early menopause, and that is a reason to talk to your GP.

Picture someone aged 46 who has had irregular periods for two years. She is neither too early nor too late; she is mid-perimenopause. That is precisely where a blood value is least predictable.

If menopause clearly arrives before 40, doctors call it early or premature menopause. Sometimes there's a cause, sometimes not. In that case a blood test can help clarify the picture, and a talk with your GP is wise.

How do you know if you're in menopause?

You usually recognise the transition from a mix of things: a changing cycle, hot flushes, night sweats, worse sleep and shifting moods. According to Thuisarts.nl, GPs often identify the transition from your age and your symptoms, not from a test.

That can feel counterintuitive. You would think a blood test would settle it. But in the phase when symptoms begin, hormones swing too much for a single number to be reliable.

Tracking your cycle and symptoms often gives more direction here than a one-off measurement. A simple log of your periods and hot flushes helps your GP more than you might think.

Which symptoms can go with menopause?

Menopause causes barely any symptoms in one woman and plenty in another. Hot flushes and night sweats are the best known, but the list is longer. Many women mainly notice the combination, and that's exactly what makes it hard to recognise.

• Hot flushes and night sweats: sudden warmth, often in your face, neck and chest.
• Worse sleep: trouble falling asleep, or waking at night and not drifting off again.
• Shifting mood: irritability, low mood or restless, anxious feelings.
• Changing cycle: shorter, longer, heavier or skipped periods.
• Vaginal dryness: sometimes with a burning feeling or pain during sex.
• Concentration and memory: the familiar "brain fog", forgetfulness.
• Joint and muscle complaints: stiffness or vague pain without a clear cause.

These symptoms can have other causes too. So the whole picture matters more than one symptom or one blood value. A doctor looks at the pattern, not a snapshot.

Which blood values relate to menopause?

A few hormones come up most often around menopause. They don't prove a diagnosis, but together they can sketch a picture. The table below lists them, with what a change might mean and where you can have the value measured. Read it as context, not a verdict.

If you want several of these values measured at once, a menopause panel fits. For more on estrogen, read our piece on estrogen and menopause.

When reading your result, note the laboratory's reference ranges. They can differ per lab, and they often account for your age and the stage in your cycle. A value just outside the reference isn't automatically worrying; the context sets the meaning.

Menopause, or something else?

Not every symptom around 50 comes from menopause. Several conditions cause similar symptoms, and those can be told apart with a blood test. That's one of the strongest reasons to test.

An underactive thyroid causes fatigue, feeling cold and low mood. Anaemia from low iron causes tiredness and paleness. Long-term stress or burnout can affect your sleep and mood in a way that resembles menopause. See also our explainer on thyroid and fatigue.

If you mainly feel exhausted, our pillar always tired helps list the possible causes. A broader blood test can reveal several of these trails at once.

When is a hormone test useful in menopause, and when not?

A hormone test adds most when you're younger than 45 and still have menopause symptoms, or when your symptoms are hard to place. In a typical transition around 50 the test is usually not needed, because the diagnosis rests on your symptoms.

There is another good reason to test: ruling out other causes. An underactive thyroid or anaemia can cause symptoms that look like menopause. A broader blood test can reveal those trails.

So the question isn't only "what's my FSH", but "what do I want to know". To confirm your menopause, your story usually leads. To rule out other causes, blood testing is genuinely useful. Discuss with your GP what fits your situation.

Can a home self-test tell you you're in menopause?

There are self-tests that measure FSH in your urine. They signal whether your FSH is raised, but they don't tell you which stage you're in. Because FSH fluctuates in perimenopause, such a test can be positive one week and negative the next.

So a self-test gives a first impression at most. For a fuller picture, a blood test measures several hormones at once, and a doctor assesses your result. If you want more certainty, blood testing is more reliable than a single urine strip.

Whatever you choose, one result stays a snapshot. Your symptoms and your cycle over time often say just as much.

How do you test your hormones without a referral?

You can also test your hormones without a GP referral. You choose a test yourself, give blood at a collection point and receive your result digitally, with a doctor's assessment. That gives you quick insight, without a waiting list.

Practically, a morning appointment helps. Some hormones vary across the day, and a fixed time makes results more comparable. If you still menstruate, the day in your cycle sometimes matters; ask at the collection point.

A menopause panel often measures several hormones at once, so you don't have to lean on a single number. Some people choose to test periodically to build a picture over time. Whether that suits you depends on your symptoms and your preferences.

If you receive your result digitally, take the time to read it calmly. The accompanying notes and the doctor's assessment help you put the numbers in perspective, especially when a value falls just outside the reference.

Whatever your result shows, it stays a snapshot. If symptoms persist, or you're unsure what a value means, discuss it with your GP. To first see which values a hormone test measures, read that overview.

What can you do yourself during menopause?

There are often gains to be made around your lifestyle, even if it doesn't fix everything. Regular exercise, enough sleep and attention to your diet help many women feel better. Less alcohol and caffeine in the evening can ease hot flushes and sleep problems.

These are general tips, not treatment advice. For symptoms that affect your daily life there are treatments, such as hormone therapy. Whether those suit you is something you discuss with your GP, who weighs your symptoms, your health and your preferences.

My experience: women who track their symptoms and cycle for a few months have a better conversation with their doctor. You arrive not with "I don't feel well", but with a concrete picture of what's happening and when.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Sources

• Harlow SD, et al. Executive summary of the Stages of Reproductive Aging Workshop +10. J Clin Endocrinol Metab. 2012. PMID 22344196.
• Baker FC, et al. Sleep and sleep disorders in the menopausal transition. Sleep Med Clin. 2018. PMID 30098758.
• Thuisarts.nl. I am going through menopause. Dutch College of General Practitioners (NHG).