How does perimenopause change your sleep?

Slow-wave sleep declines, REM fragmentation increases, and arousal threshold drops. Beyond just "more night wakings" — measurable changes in PSG studies.

1 min readReviewed May 2026

By Sarah Editor, MA Journalism, Certified Menopause Coach · Medically reviewed by Jane Smith, MD, MD, NAMS-certified · menopause nams

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Last medically reviewed: 5/15/2026 · Last updated: 5/15/2026 · Next review due: May 2027

Disclosure: Jane Smith, MD declares no financial relationship with the telehealth providers featured in this content.

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Slow-wave sleep declines, REM fragmentation increases, and arousal threshold drops. Beyond just "more night wakings" — measurable changes in PSG studies.