Late perimenopause
STRAW minus1 · typical age 45–55 · typical duration 1–3 years
Cycles become highly irregular with intervals of 60+ days between periods. Hot flashes are usually frequent. Most women in this stage are within 1–3 years of their final menstrual period.
Hormonal profile
FSH consistently >25 IU/L, estradiol increasingly variable and trending lower.