
Comment vos règles changent pendant la périménopause
Revu par Dr Colin Tidy, MRCGPDernière mise à jour par Lynn StephenLast updated 20 Feb 2026
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La périménopause signifie « autour de la ménopause ». C'est la période où votre corps commence à se préparer à la ménopause, c'est-à-dire l'arrêt de vos règles. Pendant la périménopause, vos niveaux d'hormones fluctuent, ce qui peut rendre vos règles plus irrégulières. Nous expliquons pourquoi cela se produit - et à quoi vous pouvez vous attendre concernant votre cycle menstruel pendant la périménopause.
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The average length of time for périménopause is around 4 years, but it is different for each person. Once you've gone through 12 consecutive months without a period, you've officially reached ménopause and the perimenopause period is over.
During perimenopause, your levels of the hormones oestrogen - one of the main female hormones - and progesterone rise and fall. This affects your menstrual cycle.
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What to expect during perimenopause
Premenstrual symptoms
Dr Jayne Forrester-Paton, a GP and British Menopause Society accredited menopause specialist at Your Menopause Doctor, says it’s very common for your des règles to gradually change as you enter perimenopause.
“One of the earliest signs of perimenopause can be a gradual worsening of premenstrual symptoms (PMS), these can be physical, as well as psychological,” she says. “For example, you may experience worsening récurrents, les ballonnements, breast tenderness, and mood changes in the days leading up to a period. For some women, the duration of PMS lengthens and they have less 'good' days each month.”
Forrester-Paton says some women may notice night sweats or hot flushes just in the days leading up to their period.
“Periods may still be regular at this stage,” she adds.
Irregular periods
As you progress through perimenopause, your des règles may become more irregular than usual.
“A classic pattern is for your periods to get closer together before gradually becoming spaced further and further apart, until they eventually stop altogether,” explains Forrester-Paton.
Heavier or lighter periods
It is also common for periods to become heavier as the gaps between them widen. You may also experience spotting between periods.
“Some people may experience flooding or clots for the first time,” says the menopause specialist. “However, as with everything related to the ménopause and perimenopause, the experience varies widely from person to person. Some will experience periods abruptly stopping with little warning, or others lighter and easier to manage periods.”
Anovulatory cycles
Une anovulatory cycle is a menstrual cycle in which ovulation - the release of an egg from the ovaries - doesn’t happen. Anovulation is often due to hormonal imbalances and can occur during perimenopause.
Signs of an anovulatory cycle vary, but can include:
Irregular periods.
Missing periods.
Unusually règles abondantes or light bleeding
Sometimes, though, there are no obvious signs.
Blood colour changes
Your menstrual blood may also look different and sometimes, it can appear darker or brown. Menstrual blood appears red when it’s fresh and has left the body quickly, but it can look darker if it is old, oxidised blood that has been in the uterus for longer. This can happen during perimenopause because hormonal imbalances mean the uterine lining breaks down differently.
Discharge changes
You may notice changes in the consistency of your discharge, which may become thinner or thicker.
How to manage changes to your period
Retour au sommaireIt can help to track your period on a calendar, so you can see how your menstrual cycle is changing. Note down any other symptoms, such as unusual bleeding or pain - so you can show your doctor if you need to.
Maintenir tampons, sanitary towels, and a change of underwear in your bag can be a good idea if you’re not sure when your period will arrive, or how heavy it will be. It’s also helpful to have over-the-counter painkillers such as paracetamol or ibuprofen on hand too. You can also buy period-proof underwear, which will absorb unexpected leaks or spotting.
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When to see a doctor about changes in your period
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"It’s important not to ignore changes to your bleeding pattern or flow and to discuss this with your doctor to ensure any concerning causes can be ruled out," says Forrester-Paton.
Irregular bleeding can be a sign of other underlying conditions.
You should speak to your doctor if you have:
Saignements abondants.
Pleeding that lasts longer than a week.
Bleeding that happens more frequently than every 3 weeks.
If you are worried about your menstrual cycle or any other symptoms, it's best to speak to your doctor to be safe.
If you’ve missed a period, and it’s possible you could be enceinte, you should take a pregnancy test. Even if you’re in perimenopause, you can still ovulate and become pregnant. If you are under 50, you can still get pregnant up to 2 years after your last period and if you are over 50, you can still get pregnant up to 1 year after your last period.
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Chaque semaine, nous explorerons différents sujets pour vous aider à mieux comprendre et naviguer dans votre parcours ménopausique, y compris le THS, l'alimentation, l'exercice et la santé mentale.
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About the authorView full bio

Lydia Smith
Feature writer
BA, MA, MSc
Lydia Smith is an award-winning journalist and feature writer who has written extensively on women's health and mental health. She is currently studying for an MSc in psychology.
About the reviewerView full bio

Dr Colin Tidy, MRCGP
Médecin généraliste, Auteur médical
MBBS, MRCGP, MRCP (Paediatrics), DCH
Dr Colin Tidy is an NHS Doctor, based in Oxfordshire.
Historique de l'article
Les informations sur cette page sont examinées par des cliniciens qualifiés.
Next review due: 20 Feb 2029
20 Feb 2026 | Dernière version
19 sept. 2023 | Publié à l'origine
Écrit par :
Lydia Smith

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