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Editorial reviews. Affiliate fees from some providers don't affect rankings. Disclosure

No advertiser influenceAffiliate fees disclosedReviewed by board-certified clinicians

Early perimenopause

STRAW minus2 · typical age 40–46 · typical duration 2–5 years

Cycles become more variable — at least 7 days difference between consecutive cycles. Hot flashes and sleep changes can start here.

Hormonal profile

FSH rises (often >25 IU/L on early follicular days), estradiol still fluctuates within or above the reproductive range.