What perimenopause actually is
A plain-language guide to the years before your final period, and why symptoms can start long before your cycle changes.
- Written by:
- Navelle Editorial Team
- Reviewed by:
- Navelle Clinical Reviewer
- Published:
- August 1, 2026
- Reviewed on:
- August 1, 2026
Perimenopause is the transition leading up to menopause. It often begins in the early-to-mid forties, though it can start earlier, and it can last anywhere from a few months to more than eight years.
During this time, estrogen and progesterone rise and fall unevenly. That unevenness, not a steady decline, is why symptoms can feel unpredictable. You may have regular periods and still have hot flashes, sleep disruption, mood changes, brain fog, or joint aches.
Menopause itself is a single point in time: twelve consecutive months with no period. Everything after that is post-menopause.
What to notice
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