Menopause is often described as an event, which is misleading. The event is a single retrospective date — twelve months after a final period. The experience is the transition before it, and that can last anywhere from a couple of years to a decade.
What happens, and roughly when
| Phase | Typical timing | What is going on |
|---|---|---|
| Early perimenopause | Mid-forties, often earlier | Cycles shorten or become variable; symptoms may begin |
| Late perimenopause | 1–3 years before the end | Missed cycles, larger hormonal swings, symptoms peak for many |
| Menopause | Average around 51 | Defined as 12 months with no period |
| Postmenopause | After that | Symptoms ease for most; bone and heart health become the long-term focus |
The changes people actually notice
- Cycle irregularity. Usually the first sign, and the reason tracking becomes genuinely useful here.
- Hot flushes and night sweats. Common, and a major cause of the disturbed sleep that drives much of the rest.
- Sleep disruption. Often the root of the fatigue, low mood and appetite changes people attribute directly to hormones.
- Mood and anxiety. Real, common, and treatable — not something to endure quietly.
- Body composition. Muscle declines with age and fat shifts towards the abdomen.
- Bone density. Loss accelerates around and after menopause, which is why loading the skeleton matters more now than at any earlier point.
Track before you conclude
Three to six cycles of logged dates, symptoms and sleep turn a vague "something is different" into a pattern your doctor can work with — and make it far easier to tell perimenopause apart from thyroid problems, which look similar from the outside.
What responds to what you do
- Strength training. The highest-value change in this decade: it loads bone, preserves muscle and supports balance. Two sessions a week is a real intervention, not a nice-to-have.
- Protein. Requirements do not fall with age — if anything, the muscle-building response weakens, which makes adequate intake more important, not less.
- Sleep protection. A cool room and a consistent wake time help; night sweats that repeatedly wake you are worth raising medically rather than tolerating.
- Movement across the day. Steps counteract the drop in daily activity that quietly accompanies this period.
- Alcohol and caffeine review. Both commonly worsen hot flushes and sleep in this phase.
Shortening first, then unpredictability, then missed cycles — that sequence is typical, and seeing it written down removes a great deal of uncertainty.
Kiva's note
If you only add one thing this decade, make it two strength sessions a week. Nothing else on the list protects bone and muscle at the same time.
Treatment is a medical conversation
Hormone therapy and non-hormonal treatments exist and help many people, but suitability depends on your medical history — this is a decision for you and your doctor, not an article. Book an appointment if symptoms disrupt your sleep, work or relationships, if periods stop before 40, if bleeding is very heavy, if you bleed between periods, or if any bleeding occurs after twelve months without a period. That last one always needs assessment.
Frequently asked questions
What is the difference between perimenopause and menopause?
Perimenopause is the transition, often lasting several years, when hormone levels fluctuate and cycles become irregular. Menopause is defined retrospectively as twelve consecutive months without a period.
At what age does perimenopause start?
Most commonly in the mid-forties, though it can begin earlier or later. Periods stopping before 40 is called premature ovarian insufficiency and should be assessed by a doctor.
Why is weight gain common around menopause?
Several things overlap: muscle mass declines with age, activity often falls, sleep is disrupted, and fat distribution shifts towards the abdomen. Strength training and protein address more of this than any specific diet.
Keep reading
Strength training for beginners: a 12-week start
Two sessions a week, six movements, one rule for adding weight. Built to be repeatable, not impressive.
Irregular periods: normal variation or not?
Where ordinary cycle variation ends, what commonly causes irregularity, and the signs that mean seeing a doctor.