Perimenopause Often Starts Around 47, With Hot Flashes Hitting 80% Later
Updated
Updated · The Guardian · Jun 7
Perimenopause Often Starts Around 47, With Hot Flashes Hitting 80% Later
3 articles · Updated · The Guardian · Jun 7
Summary
Age 47 is the average starting point for perimenopause, and the clearest early sign is a menstrual cycle that becomes irregular—often arriving at least a week early or late or skipping altogether.
About 40% of women have hot flashes in early perimenopause, rising to roughly 80% later, as ovarian estrogen production becomes lower and more erratic and also disrupts sleep, mood, and genital and bladder health.
Over 45, typical symptoms are usually enough for clinicians to diagnose perimenopause without blood tests, because estrogen levels swing so widely that a single result can be misleading.
Blood tests are more useful when symptoms are atypical, start unusually early, or periods are masked by an IUD, hysterectomy, or chemotherapy; doctors may also need to rule out thyroid disease or diabetes.
12 months after the last period marks menopause itself, and experts say bothersome symptoms should prompt treatment—hormonal and non-hormonal options exist but remain underprescribed.