98% of the female population have 4-8 years of menstrual changes before they reach menopause.

Hot flashes are reported in approximately 75% of women in menopause.

The average age when menopause occurs in the United States is 51.

Smoking has been shown to hasten the onset of menopause. One study showed women smokers could enter menopause in their mid forties.

A woman is in menopause when she has missed 12 consecutive monthly periods.

The longest period for the transition between perimenopause and full menopause is 10 years.

Only 1% of American women are reported to be in full menopause before 40 years of age.

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