How long does perimenopause last?

When it starts and when it ends

Perimenopause means around menopause. It begins when your ovaries start making estrogen and progesterone less steadily, usually in your 40s, sometimes in your late 30s. It ends with your final period. You only know that period was the last one in hindsight: after 12 months with no bleeding, you've reached menopause, and the time after that is postmenopause.

Cleveland Clinic puts the average length at about four years, with some people taking up to eight. The menopause transition as a whole, including the years of shifting symptoms around it, often spans longer. See what age perimenopause starts and what age periods stop.

The two stages

These stages come from STRAW+10, the system researchers and doctors use to describe reproductive aging. They're based on what your cycle does, not on hormone tests, because hormone levels jump around too much in perimenopause for one blood test to tell you much.

What can make it longer or shorter

• Age at onset: people who start perimenopause earlier often spend longer in it.
• Smoking: linked to an earlier menopause.
• Genetics: family patterns are a useful clue.
• Medical treatment: chemotherapy or ovary surgery can shorten or end it abruptly.
• Hormonal contraception: can mask the signs, so it's harder to tell when it started.

Symptoms don't always follow the same clock

Some symptoms, like hot flashes, can start in perimenopause and continue for years after your last period. Others, like heavy or irregular bleeding, stop at menopause. Mood changes are often most noticeable in the late stage, when hormones swing the most, and many people find mood steadies a year or two after their final period. Our perimenopause symptoms page has the full list.

Your timeline is yours

There's no way to know in advance how long your perimenopause will last. Tracking the gaps between periods and how you feel each week is the clearest way to see which stage you're in.