The short explanation
Perimenopause often begins some years before the final period, most commonly in the forties. For many women it lasts around four to eight years, though it can be shorter or longer. Menopause itself is only confirmed in hindsight, after twelve months in a row without a period. Early signs are often subtle: a cycle that becomes shorter or less predictable, changes in flow, poorer sleep, hot flushes, night sweats, mood changes or less interest in sex. Not everyone gets all of these, and some women notice very little.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Age at menopause varies. Family history gives some hint, and smoking tends to bring menopause earlier. Surgery to remove the ovaries, or some cancer treatments, can cause menopause suddenly rather than gradually.
- Pregnancy is still possible during perimenopause, even with irregular periods, so contraception remains relevant until a doctor advises it can stop.
- Symptoms that start before forty deserve a check, because early menopause has its own health effects that are worth discussing.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- No online answer can tell you where you are in this transition or how long it will last for you. Your own periods over time, and your doctor's assessment, are what decide it.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Do my current changes fit with perimenopause?
- Do I still need contraception, and for how long?
- Which symptoms are worth treating, and what are the options?
- What should I watch for in my periods during these years?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Book an appointment soon
- See a doctor within a few days if you have bleeding between periods, after sex, or periods that are suddenly much heavier.
Raise it at a routine appointment
- Book a routine check-up to discuss perimenopause, contraception and any symptoms that bother you.
Sources
The evidence this explanation is built on.
- Menopause NHS
- Menopause — symptoms NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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