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Estrogen falls off a cliff at menopause, so it feels logical that testosterone follows the same pattern. Social media widely promotes testosterone as essential menopause care for brain fog, fatigue, and low mood, reinforcing the parallel.
A 2025 study in eBioMedicine measured testosterone in 1,104 women aged 40 to 69 using LC-MS/MS assays, the most accurate method for measuring hormones in blood. No measurable differences appeared between premenopausal, perimenopausal, and postmenopausal women. Well-established research now shows testosterone declines about 50% from age 20 to 60, a gradual slope that begins in the twenties, has no relationship to when periods stop, and reflects the postmenopausal ovary still producing 40% to 50% of a woman's testosterone.
A woman at 50 should not assume menopause suddenly crashed her testosterone. The decline started decades earlier and is tied to age, not menopausal status. That distinction matters when deciding whether supplementation corrects a menopause-caused deficit or addresses something else entirely.
The ovaries do not retire from testosterone production when periods stop.
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