Perimenopause symptoms checklist: the 34 signs, by age.
Perimenopause is the transition before menopause. It usually begins in the mid-forties and lasts several years. Its symptoms fall into seven groups: cycle changes, heat, sleep, mood and thinking, body, skin and hair, and bladder and sexual health. This checklist sets out 34 recognised signs, sorted by type and by age, and explains which of them a blood test can help with.
What perimenopause is, and when it usually starts
Perimenopause is the stretch of years when your ovaries gradually change how they work. Oestrogen and progesterone no longer follow a predictable monthly pattern; they surge and dip, sometimes within the same cycle. Those swings, rather than a steady decline, are what drive most of the symptoms on this page.
Menopause itself is a single point in time: your final period, which can only be confirmed once 12 months have passed without another one. In Australia the average age of menopause is around 51, according to Jean Hailes for Women's Health and the Australasian Menopause Society. Perimenopause typically starts somewhere in the mid to late forties, although for some women the first changes arrive in the early forties. For many women it lasts several years, commonly four to six, and for some it stretches closer to ten.
Two terms matter if changes come early. Menopause before 45 is called early menopause. Menopause before 40 is called premature ovarian insufficiency, and it always warrants a doctor's assessment rather than a wait-and-see approach.
The 34 symptoms, grouped
There is no official list of exactly 34 perimenopause symptoms, but the number shows how wide the range is. The groups below cover the signs Australian health authorities recognise. Nobody experiences all of them, and most women have a handful that come and go.
Cycle changes
- Cycles that get shorter, often by a few days at first
- Cycles that get longer, or months that are skipped altogether
- Heavier periods, sometimes with clots or flooding
- Lighter or shorter periods than you used to have
- Spotting between periods
- Premenstrual symptoms that feel stronger than they used to
Vasomotor (heat) symptoms
- Hot flushes: a sudden wave of heat in the face, neck and chest
- Night sweats that wake you or soak the sheets
- Cold flushes or chills, often straight after a hot flush
Sleep
- Waking in the early hours and not getting back to sleep
- Trouble falling asleep, even when tired
- Waking unrefreshed after what should have been enough sleep
Mood and cognition
- New or worsening anxiety, sometimes with a racing mind
- Irritability, a shorter fuse than usual
- Low mood or feeling flat
- Mood swings that seem out of proportion to what is happening
- Brain fog: losing your train of thought, forgetting words
- Poor concentration or difficulty holding detail
- Loss of confidence or a sense of not being yourself
Body
- Fatigue that rest does not fix
- Joint and muscle aches with no obvious cause
- Headaches, or a change in migraine pattern
- Palpitations or a racing heart
- Weight gain, especially around the middle
- Breast tenderness
- Bloating
Skin and hair
- Dry, itchy or thinner skin
- Hair thinning or shedding more than usual
- Adult acne, often along the jaw
- Brittle nails
Bladder and sexual health
- Vaginal dryness or discomfort
- Reduced libido
- Urinary urgency or needing to go more often
- Urinary tract infections that recur
Symptoms by age band: early 40s, 45 to 49, 50 and over
These are typical patterns, not rules; plenty of women fall outside them.
Early 40s: the subtle start
At this stage oestrogen is still being produced, sometimes in higher-than-usual bursts, but progesterone is often lower because ovulation is becoming less reliable. The result is frequently a change in the cycle before anything else.
- Cycles shortening by two to four days
- Heavier or more painful periods
- Premenstrual mood symptoms that feel amplified
- Early-morning waking
- New anxiety or irritability that gets put down to stress
- Breast tenderness and bloating
Hot flushes are less common in this band, which is one reason perimenopause gets missed. If your cycle is changing in your early forties, it is worth writing down what you notice, because the pattern is what a doctor will ask about.
45 to 49: the classic picture
This is the age band most people picture when they think of perimenopause. Cycles become irregular in both directions, and the vasomotor symptoms usually appear.
- Skipped periods, then a heavy one
- Hot flushes and night sweats
- Sleep that breaks up most nights
- Brain fog and word-finding difficulty
- Joint aches, headaches, palpitations
- Weight shifting to the middle despite no change in habits
- Vaginal dryness starting to appear
50 and over: the late transition and beyond
Around the average age of menopause, periods space out further and eventually stop. Some symptoms ease once hormone levels settle at a lower, steadier baseline; others, particularly those affecting the vagina and bladder, can persist or appear for the first time.
- Periods becoming very infrequent, then stopping
- Hot flushes and night sweats, which may continue for some years
- Vaginal dryness and discomfort with sex
- Urinary urgency and recurrent urinary tract infections
- Dry skin and hair changes
- Sleep and mood symptoms that improve for many women, but not all
Twelve months without a period, with no other explanation, is how menopause is confirmed, and it dates back to that final period. From then on you are postmenopausal, and the health conversation shifts towards bone, heart and metabolic health. The perimenopause and menopause hub covers the tests for the transition years, and the postmenopause hub covers what comes after.
What are the 7 signs of perimenopause?
"What are the 7 signs of perimenopause?" is one of the most searched questions on this topic. There is no official seven, but these are the signs women report most often:
- Irregular periods. Shorter, longer, heavier, lighter or skipped: the cycle changes first for most women.
- Hot flushes. The best-known symptom, though rarely the first.
- Night sweats. Often the reason sleep breaks up.
- Disturbed sleep. Especially waking in the early hours.
- Mood changes. Anxiety, irritability and low mood are the ones women report most.
- Brain fog. Concentration and word-finding suffer, and this is often the symptom that worries women most.
- Vaginal dryness and low libido. Less talked about, very common, and more likely as the transition progresses.
The signs people miss article explains why the early ones are so easily put down to something else.
Which symptoms a blood test can help with, and which it cannot
This is the part most checklists skip. Perimenopause is a clinical diagnosis: a doctor makes it from your age, your symptoms and your cycle history. Australian and international guidance says that in women over 45 with typical symptoms, hormone testing is not needed to reach that diagnosis, because FSH and oestradiol swing so much during the transition that a single reading can be misleading.
That does not make a blood test useless. It changes what it is for. A test is most useful when it checks the other things that cause the same symptoms, and when your situation makes the hormone picture harder to read.
| Symptom | Can a blood test help? | Why |
|---|---|---|
| Fatigue, low energy | Yes | Thyroid function and iron stores are common, checkable causes that overlap with perimenopause. |
| Brain fog, poor concentration | Partly | No test measures brain fog, but an under-active thyroid or low iron can produce it and are worth excluding. |
| Palpitations | Partly | Thyroid over-activity and anaemia both cause a racing heart. Your doctor may also want a heart check. |
| Irregular or absent periods | Partly | FSH and oestradiol add information under 45 or on contraception; raised prolactin and thyroid problems also disturb cycles. |
| Heavy periods | Yes, for the consequences | Iron studies and a full blood count show whether heavy bleeding has drained your iron stores. |
| Hot flushes, night sweats | No | There is no blood marker for flushes. They are assessed from your description. |
| Low mood, anxiety | Partly | Thyroid and iron can contribute; the hormone picture supports, but does not settle, the assessment. |
| Vaginal dryness, bladder changes | No | These are assessed clinically, not from a blood result. |
| Hair thinning, acne | Yes | Iron, thyroid and androgen levels (testosterone, SHBG) are all relevant and measurable. |
Ranges vary by laboratory; your report shows the range your lab uses. Typical ranges on this page are drawn from Pathology Tests Explained (RCPA) and the sources listed below.
Where the hormone readings themselves carry more weight is in the grey zones: symptoms before 45, and especially before 40; no periods to track because of a hormonal IUD, an implant or a hysterectomy; or symptoms that are unusual or severe. In those situations FSH and oestradiol, read by a doctor alongside everything else, add real information. The perimenopause blood test article goes into the can and cannot in more depth, and this guide covers typical FSH and oestradiol levels by stage.
Things that mimic perimenopause: thyroid, iron and prolactin
Three checkable conditions produce a symptom list that looks almost identical to the one above. Because all three are common in women in their forties, a perimenopause work-up that does not check them is only doing half the job.
Thyroid. An under-active thyroid causes fatigue, weight gain, low mood, brain fog, dry skin, hair thinning, heavier periods and feeling the cold. An over-active thyroid causes palpitations, anxiety, heat intolerance, sweating and lighter periods. Between them they cover most of the checklist. TSH is the first-line marker, and the thyroid panel adds free T4, free T3 and antibodies. The thyroid blood tests explained article walks through what each one means.
Iron. Heavy or prolonged periods in the early transition are a classic way to run iron stores down. Low ferritin, with or without anaemia, produces fatigue, brain fog, palpitations, breathlessness on stairs, hair shedding and restless legs. Iron studies with a full blood count answer the question in one collection; see ferritin and iron studies explained for how to read the result.
Prolactin. A raised prolactin level can make periods irregular or stop them altogether, which is easy to mistake for the transition. It is measured on a standard blood test and has its own causes that a doctor will want to look into.
One more thing that mimics perimenopause is pregnancy. Ovulation becomes unpredictable during the transition and cycles without ovulation are common, but it can still happen until close to the final period. A missed period in your forties still deserves a pregnancy test if there is any chance of conception.
Take the KnowLuna perimenopause quiz
If you want to turn this checklist into something more personal, the three-minute perimenopause quiz scores twelve of the most telling symptoms and tells you whether your pattern is consistent with the transition, where a blood test would and would not add information, and what to raise with a doctor. It is a guide to the conversation, not a diagnosis. If you are not sure perimenopause is the right starting point at all, find your test asks four broader questions instead.
Common questions
What are the first signs of perimenopause?
For most women the first sign is a change in the cycle: a few days shorter, heavier, or with stronger premenstrual symptoms. Early-morning waking, new anxiety and irritability often follow soon after. Hot flushes usually come later. Because the early signs are so easy to attribute to stress or a busy life, many women do not connect them to perimenopause until the cycle changes become obvious.
What is the average age of perimenopause?
Perimenopause most often begins in the mid to late forties, and the average age of menopause in Australia is around 51. Some women notice changes in their early forties. Menopause between 40 and 45 is called early menopause, and menopause before 40 is premature ovarian insufficiency, so symptoms at these ages should be assessed properly rather than assumed, and this is where a blood test carries more weight than it does over 45.
Is it normal to have perimenopause for 10 years?
It is longer than average but within the range that is described. Many women have symptoms for several years, commonly four to six; some notice the first cycle changes in their early forties and reach menopause in their early fifties, which adds up to about a decade. If symptoms have gone on that long and are affecting your life, it is reasonable to ask a doctor to review the picture and check that nothing else is contributing.
What are the three stages of menopause?
Perimenopause is the transition, when cycles change and symptoms appear. Menopause is your final period, confirmed once 12 months have passed without another one. Postmenopause is everything after that. Symptoms can occur in all three stages, but the cycle changes belong to perimenopause, and the bladder and vaginal symptoms tend to become more noticeable later on.
Can you still get pregnant during perimenopause?
Yes. Ovulation becomes unpredictable and cycles without ovulation are common, but it can still happen until close to the final period. Australasian Menopause Society guidance is that contraception is advised for two years after your last period if it happens before 50, and for one year if it happens after 50. If there is any chance of conception, a missed period in your forties still warrants a pregnancy test before it is put down to perimenopause.
How do you tell if you're in perimenopause?
Mostly from the pattern: several symptoms from this checklist arriving together, in your forties or early fifties, alongside a change in your cycle. A doctor makes the assessment from your age, symptoms and cycle history. Hormone results are not needed over 45 with typical symptoms, but a blood test that checks thyroid, iron and prolactin is useful for ruling out the conditions that mimic the transition.
Sources and further reading
- Australasian Menopause Society: Perimenopause or menopausal transition (information sheet)
- Australasian Menopause Society: Diagnosing menopause (information sheet)
- Australasian Menopause Society: Contraception (information sheet)
- Jean Hailes for Women's Health: menopause
- Healthdirect: perimenopause
- Harlow SD et al. Executive summary of the Stages of Reproductive Aging Workshop +10 (STRAW+10). 2012
General information only, not medical advice. If your symptoms are severe or sudden, see a doctor promptly. This page does not replace a consultation with a doctor who knows your history; read our medical disclaimer.