Low Testosterone in Women: Symptoms, Causes and How It Is Tested

01The Short Answer

What Are the Symptoms of Low Testosterone in Women?

The symptom most clearly linked to low testosterone in women is a marked drop in sexual desire, often with reduced arousal and less intense orgasm. Women also commonly report persistent fatigue that sleep does not fix, difficulty building or keeping muscle despite training, and a flatter, less motivated mood. Those broader symptoms are real, but the evidence tying them to testosterone is much weaker than it is for sexual desire.

What makes low testosterone in women hard to recognize is that none of those symptoms points obviously at a hormone, and each has a more familiar explanation on offer. Low libido gets blamed on the relationship or on being busy. Fatigue gets blamed on children and work. Losing strength gets blamed on age. It is usually only when several arrive together, and stay, that anyone thinks to ask about androgens.

The clinical term is androgen deficiency, or sometimes low free testosterone in women. Testosterone is not a male hormone that women happen to have a little of. The ovaries and adrenal glands produce it throughout life, and it acts on tissues across the body.

02The Blind Spot

Why Low Testosterone in Women Is So Often Missed

Low testosterone in women is so often missed because three things conspire. First, testosterone is culturally coded as male, so neither patients nor many clinicians think to check it in a woman. Second, the symptoms overlap heavily with perimenopause, depression, thyroid disease and simple exhaustion, all of which get considered first. Third, laboratory testosterone results in women are hard to interpret. Routine assays are least precise at female concentrations, and no blood level separates women with symptoms from women without them.

There is also a regulatory gap. No testosterone product is approved in the United States specifically for women, so the condition has no branded treatment marketing behind it and correspondingly little awareness. That does not make it less real. The Endocrine Society and the International Menopause Society both recognize hypoactive sexual desire disorder (HSDD) in postmenopausal women as a condition in which testosterone has a demonstrated role; both endorsed the 2019 Global Consensus Position Statement on testosterone therapy for women, alongside the North American Menopause Society and eight other bodies. The trial evidence behind it is a 2019 meta-analysis in The Lancet Diabetes & Endocrinology of 36 randomized trials with 8,480 participants, which found testosterone improved sexual desire, arousal, orgasm and pleasure in postmenopausal women compared with placebo or a comparator. It also found more acne and hair growth, no serious adverse events, and lipid changes with oral but not transdermal testosterone, which is why non-oral routes are preferred. The same consensus is blunt about the limits: HSDD is the only evidence-based indication for testosterone in women, and there are insufficient data to use it for any other symptom.

The practical result is that many women arrive at a testosterone conversation years after symptoms began, often after estrogen has been addressed and something is still missing.

03Mechanism

What Testosterone Actually Does for Women

In women, testosterone acts directly on androgen receptors in muscle, bone, brain, skin and genital tissue, and it is also converted into estrogen within those tissues. That dual role is why so many symptoms get attributed to it. The trial evidence is narrower than the biology, though: treatment has shown clear benefit for sexual function, while effects on muscle, bone and cognition remain unproven.

In the brain, testosterone is thought to act on the circuits that govern motivation and sexual interest. That fits the symptom women describe most often and find hardest to explain: not sadness exactly, but a loss of appetite for things they used to want, sex included. Testosterone is not a mood treatment, though. The 2019 consensus found no effect of testosterone on depressed mood or general wellbeing in postmenopausal women. Some antidepressants can themselves lower libido, which is worth reviewing when desire has fallen.

Genital tissue contains androgen receptors. Reduced arousal, reduced sensation and reduced orgasm intensity are not only psychological, and these are the outcomes where testosterone trials show benefit.

04Causes

What Causes Low Testosterone in Women?

The most common cause of low testosterone in women is time. In a study of 1,423 Australian women aged 18 to 75, total and free testosterone declined steeply with age, with the steepest fall in the earlier decades, and natural menopause itself had no independent effect on androgen levels. Unlike estrogen, which drops sharply at menopause, testosterone declines gradually, which is one reason its symptoms creep rather than arrive.

Surgical menopause is the sharpest cause. In the same study, women aged 55 or older who had both ovaries removed had significantly lower total and free testosterone than women who had not, because the ovary keeps producing testosterone after natural menopause. Symptoms after that surgery are often attributed entirely to estrogen loss when androgen loss may be contributing.

Other causes include oral estrogen, including the combined contraceptive pill, which raises a binding protein called sex hormone-binding globulin and thereby lowers the free, usable fraction of testosterone even when total levels look normal. Adrenal insufficiency, pituitary disorders, chronic corticosteroid use, and some cases of premature ovarian insufficiency also reduce production. Chronic under-eating and very high training volumes can suppress the whole axis. Age is the main cause, and ovarian surgery, oral estrogen and other conditions add to it.

05Testing

How Low Testosterone in Women Is Tested — and Why the Number Alone Misleads

Low testosterone in women is tested with a blood test, ideally drawn in the morning when levels are highest and between days three and ten of the cycle in women who are still cycling, but the number alone misleads. Two values are usually reported: total testosterone, and free testosterone, which is the fraction not bound to sex hormone-binding globulin and therefore available to tissues. A woman on an oral contraceptive can have a normal total and a low free level.

The second problem is assay sensitivity. Standard testosterone assays were designed around male concentrations, and many are imprecise at the low end where all female values sit. The 2019 consensus notes that liquid or gas chromatography with tandem mass spectrometry measures total testosterone with high accuracy, so it is worth requesting.

Most importantly, what is considered low testosterone in women is a clinical judgment, not a threshold. The 2019 consensus states that no cutoff blood level of any androgen separates women with and without sexual dysfunction, and that a blood total testosterone level should not be used to diagnose HSDD. The number is read alongside the symptom pattern, cycle status, medications, thyroid function, iron status and mood. In treatment, testosterone levels are used mainly to keep a woman in the normal female range. So the blood test informs the picture, and the symptom pattern carries the diagnosis.

06Treatment

Low Testosterone in Women: What Treatment Is and Is Not on the Table

Where testosterone is clinically appropriate, mainly for distressing low sexual desire after menopause, it is prescribed to women at a small fraction of male dosing, most commonly as a transdermal cream or gel, and adjusted against symptoms and repeat blood levels. No testosterone product is FDA-approved for women in the United States. A prescription is therefore either an FDA-approved male product used off-label at a female dose, or a compounded cream, which is not FDA-approved. The 2019 consensus prefers approved male products used at female doses and advises against compounded testosterone unless no approved equivalent is available.

We do not publish dosing figures here. Appropriate dosing for a woman is set by a clinician against her levels and her response. The goal is to keep levels within the normal premenopausal female range, never beyond it. At those levels, trials found mild increases in acne and hair growth but not hair loss or voice change; those risks rise when levels exceed the female range, and a deepened voice may not reverse.

It is also worth saying what testosterone does not do. It is not a treatment for low mood or fatigue, it will not repair a relationship, and the 2019 meta-analysis found no effect on body composition or muscle strength, though few women contributed data. Not every low reading needs treating. A woman with a low-normal level and no symptoms has a number, not a condition.

Pellets deserve a specific caution. Implanted testosterone pellets deliver a fixed amount for months and cannot be adjusted or removed easily if levels overshoot. The 2019 consensus, endorsed by the major menopause societies, does not recommend pellets, injections or any preparation that produces supraphysiologic testosterone levels in women.

07Next Steps

When to Be Evaluated for Low Testosterone

You should be evaluated for low testosterone when sexual desire has clearly fallen from your own baseline and causes you distress, especially after menopause or ovarian surgery. That is the situation in which testosterone has trial evidence. Fatigue, slipping strength and flat mood deserve evaluation too, but they have many causes, including thyroid disease, iron deficiency, poor sleep and depression, and testosterone is not an established treatment for them.

Some symptoms need attention on their own terms regardless of hormones: rapidly increasing facial or body hair, a deepening voice, new acne after thirty, or a sudden change in cycle. Those suggest testosterone that is too high or a different cause entirely, and should be assessed directly.

Protocol Health's female hormone assessment runs through our women's hormone optimization program in Scarsdale and across Westchester County, and by telehealth in New York, New Jersey, Connecticut, Florida and California. It looks at your symptom pattern and history alongside properly timed labs — total and free testosterone, sex hormone-binding globulin, estradiol, thyroid and iron. Where testosterone does fit, our testosterone cream for women is prescribed at female doses and monitored with repeat levels.

The bottom line: low testosterone in women is real but hard to measure. Its best-documented symptom is low sexual desire, no blood level alone can diagnose it, and treatment, when it fits, keeps levels inside the normal female range.

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