Perimenopause: Age, Stages, Signs, Symptoms & Treatment (Cleveland Clinic)
Where this fits: Do At-Home Perimenopause Tests Actually Work? The Test That Can't Tell You
Claims this source supports
- Perimenopause may begin as early as your mid-30s or as late as your mid-50s.
- During perimenopause the ovaries begin producing less hormones, and hormone levels commonly fluctuate, going up and down rather than declining in a straight line.
- The average length of perimenopause is about four years, but it can last up to eight years.