Low Testosterone in Midlife: Symptoms, Signs, and Causes

medical form on clipboard with stethoscope and glasses — Photo: Vitalii Vodolazskyi / Shutterstock

Testosterone does not crash the moment a woman hits menopause, and new research shows the real culprit behind midlife low testosterone is aging itself, plus habits people can actually change.

Story Snapshot

Large studies find testosterone falls gradually from around age 40 through the late 50s, with no sudden drop tied specifically to menopause.
The Endocrine Society says obesity, diabetes, smoking, heart disease, and depression explain most of the apparent age-related testosterone decline in both sexes.
Medical groups still lack agreed normal ranges for female testosterone, so diagnosing “deficiency” remains murky science.
Men face a similar pattern: slow, steady decline rather than a dramatic midlife cliff.

What The Data Actually Shows About Midlife Testosterone

A 2025 study of more than 1,100 Australian women, part of the Australian Women’s Midlife Years project, tracked testosterone from age 40 into the late 50s. Levels dropped gradually the whole time. There was no separate plunge when women crossed into menopause. That finding echoes older research showing testosterone declines steadily during the reproductive years and barely shifts at the menopause line itself.

Another large analysis backs this up. Researchers found testosterone bottomed out around age 58 to 59, then ticked back up slightly. The dip lined up with age, not with when a woman’s periods stopped. A separate Australian team called this pattern clear enough to challenge decades of assumptions, saying their work “refutes the belief that menopause causes testosterone deficiency”.

Where The Popular Myth Came From

Plenty of health sites still tell women that testosterone “drops by half” at menopause, treating the hormone shift like the sudden estrogen crash that defines the change. That confusion makes sense on the surface. Estrogen really does fall off a cliff at menopause. Testosterone does not follow the same script, and lumping the two together has muddied advice for years.

Men get a version of this myth too, often called “manopause.” Testosterone in men slides down about one to two percent a year starting in midlife, and roughly 30 percent of men between 40 and 79 end up with levels doctors call low. That is a slow slope, not a sudden wall, much like what researchers now describe in women.

The Real Drivers Behind Low Numbers

An Endocrine Society scientific statement points to a more useful list of suspects. Overweight and obesity, insulin resistance or diabetes, smoking, cardiovascular disease, and depression together explain most or all of the apparent age-related drop in blood testosterone. In plain terms, a lot of what gets blamed on “getting older” traces back to weight, metabolic health, and lifestyle choices people can influence.

Body fat also plays a direct role for women. One study of midlife women found visceral fat, the deep abdominal fat tied to metabolic disease, was linked to shifts in available testosterone independent of age or total body weight. That is a meaningful distinction. A number on a lab report may say less about the calendar and more about what is happening around a person’s organs.

Why Diagnosis Still Lags Behind The Science

Medical groups have struggled for two decades to agree on what a “low” testosterone number even means for women. The Endocrine Society advised against diagnosing androgen deficiency in women back in 2006, citing no well-defined syndrome and no solid data on normal levels across a lifetime. That gap in the science has not closed. Sex hormone binding globulin, a protein that carries testosterone in the blood, also shifts after menopause and can throw off free testosterone readings, adding another layer of confusion to any single lab value.

Even so, a coalition of medical societies, including the Endocrine Society and the International Menopause Society, issued a joint position statement in 2019 backing short-term testosterone therapy for women with a specific, diagnosed sexual desire disorder. That is a narrow, evidence-based lane, not a green light for treating every midlife complaint with a hormone patch. Patients deserve that distinction spelled out clearly by their doctors.

The bigger takeaway cuts against the instinct to medicalize normal aging. Chasing a hormone number without first tackling weight, blood sugar, smoking, and mood risks missing the actual problem. Common sense says fix the fixable things first. The research backs that instinct up.