Perimenopause Early Signs: What Actually Changes First

"It's normal at your age."

If you have said something felt different and that was the answer, you already know what happens next. Nothing. No follow-up, no plan, no date to come back. You go home with the same symptoms you arrived with and an added suspicion that you made a fuss about nothing.

Here is the part that sentence leaves out. Something changing at 44 can be entirely normal for 44 and still be treatable, still be tracked, and still be the reason you cannot think straight by 3pm. Normal and untreatable are not the same word, and they get used as though they are.

So this is what actually changes, and roughly in what order.

What perimenopause is, and how long it goes on for

Perimenopause is the transition, not the finish line. It covers the years leading up to your last period and the 12 months after it. Menopause itself is a single point in time, the day that marks 12 months since your last natural period, which means it can only ever be identified looking backwards.

It commonly begins in the mid to late 40s, and it can begin in the early 40s or the late 30s. Most women spend 4 to 8 years in the transition before reaching menopause. That length is the bit that surprises people. If you are 43 and something has changed, you are not early for it.

The reason it feels so random is that oestrogen is not simply falling in a straight line. It swings, up and down, sometimes within the same month. You can have a level in the normal range one week and a very low one the next. Those swings are what produce the symptoms, not just a low number, which is also why a single blood test taken on a single day tells you so little.

The first thing that changes is usually your cycle

This is the earliest signal in most women, it arrives before the symptoms anyone talks about, and it costs nothing to track.

Early in the transition, cycles often get shorter and bleeding can get heavier. Later, the gaps get longer and periods get lighter, until they stop. In between, the pattern goes unpredictable: 24 days, then 35, then 21. Flow changes from what has always been normal for you.

The problem is that almost nobody is asked about this. You are asked whether you are still having periods, which is a yes or no question, and the answer that matters is how they have changed over the last 12 to 24 months. That is a different question and it produces completely different information.

If you take one thing from this post, make it this: start writing down cycle length and flow, on paper or in an app, from today. 2 or 3 months of that record is more useful in a consultation than any single hormone test.

One thing to always report rather than track: bleeding after sex, bleeding between periods, or any bleeding at all after 12 months without one. Those are not part of the transition and they need checking quickly rather than watching.

The symptoms that arrive next

There is no correct order and no standard set. Some women have hot flushes as the whole story and barely notice anything else; others never get a flush and lose 2 years to sleep and mood. What follows is common, not compulsory.

Sleep that breaks in the middle. Not trouble falling asleep, but waking at 3am and lying there. Sometimes with night sweats, sometimes without.

Anxiety that is new. This is the one women apologise for most. Mood changes that begin after a long stable stretch, or that follow the timing of your cycle, behave differently from a longstanding anxiety that has been there since your 20s. That distinction matters, because national guidance is specific that antidepressants should not automatically be the first response to mood symptoms in the perimenopause transition without hormones being considered first.

Brain fog and losing words mid-sentence. Forgetting names, walking into rooms, and that horrible sense of being slower than you were. The brain has oestrogen receptors in the areas involved in memory and focus, so when oestrogen goes erratic, concentration goes with it. This one frightens women more than any other symptom and it is rarely raised out loud.

Hot flushes and night sweats. The most recognised symptom, affecting roughly 75 to 80% of women in the transition, which also means a meaningful minority never get them at all. Their absence does not rule anything out.

Joints that ache without an injury. Stiff hands in the morning, achy hips, a general sense of having aged 5 years over one winter. Oestrogen supports joint lubrication and muscle recovery, and its decline is a recognised cause of this.

Palpitations. Common in the transition, and still something to have looked at properly the first time rather than assumed. A heart cause gets excluded first, then it can be filed under hormones.

Weight settling around the middle when the number on the scales has barely moved. Insulin sensitivity reduces as oestrogen declines, and where weight sits changes even when how much of it there is does not.

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The one that almost nobody mentions

Vaginal dryness. Discomfort during sex. Urinary urgency. Repeated urine infections in your 40s when you have never had one in your life.

These tissues depend on oestrogen, and they are often the first to register its absence. Sometimes they are the only symptom a woman has, which makes it very easy to conclude that nothing hormonal is happening.

Two things about this. It is one of the most treatable parts of the whole transition, and unlike hot flushes, which often settle down on their own over time, it tends to get worse without treatment rather than better. So the silence around it costs more than the silence around any other symptom on this list.

If that is the paragraph you have skimmed past twice, go back and read it. It is the reason I have put it in its own section.

What "it's normal at your age" actually costs

Not a diagnosis, because in most cases the diagnosis was never in doubt.

If you are 45 or over with symptoms that fit, this is a clinical diagnosis. It is made from the conversation. National guidance is clear that a blood test is not required to make it in this age group, and that a normal result does not exclude it, because the hormone usually measured swings so much that testing it on one particular Tuesday tells you almost nothing.

So what the sentence costs is the next step. It costs a proper cycle history. It costs a symptom score at the start so that anything tried afterwards can actually be measured against something. It costs a conversation about what your options are, and in what order, and it costs the appointment where somebody writes it all down so that in 2 years there is a record to compare against.

It also costs the checks. There are other conditions that produce this exact symptom list, and there are red flags that should never be filed under hormones. Blood tests in perimenopause are not there to prove the diagnosis. They are there to rule out what else it could be, and to set a baseline before anything is started. That is a genuinely different purpose and it changes what gets ordered.

And one practical thing that gets lost entirely in the shrug: ovulation is unpredictable in the transition, not absent. If you do not want to be pregnant, you still need contraception.

What I would do with this, this month

Track your cycle. Length and flow, every month, starting now. It is free, it is the earliest signal you have, and it is the single most useful thing you can bring to any appointment.

Write your symptoms down with dates next to them. Note what was happening in your life at the time. Patterns that are invisible week to week become obvious over 3 months.

Then ask for the conversation rather than the test. If you are over 45 with symptoms that fit, you are entitled to be assessed on those symptoms. And if you would like all of it looked at in one place, by someone who will ask about your cycle before anything else, that is what a Women's Health Consultation at Debora Tentis Clinic is for.

"It's normal at your age" describes the situation. It has never once been a plan.

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Every Sunday I send one email on hormones, metabolic health and skin, written for women who are tired of being told it is normal at their age. Sign up at deboratentis.com.

Debora Tentis is a Women's Health Pharmacist based in Milton Keynes. She runs Debora Tentis Clinic, specialising in hormonal health, metabolic optimisation, and facial aesthetics for professional women. This article is health education, not medical advice. Book at deboratentis.com