When a woman takes testosterone, her body undergoes a range of changes that depend heavily on the dose and how long she takes it. At low, medically supervised doses, the effects are relatively mild and mostly reversible. At higher doses or over longer periods, testosterone triggers more dramatic physical changes, some of which are permanent. Women naturally produce testosterone, but at levels 10 to 15 times lower than men, so even a modest increase above the normal female range can produce noticeable effects.
Why Women Take Testosterone
Women end up taking testosterone for different reasons. Some are prescribed low doses to treat low sex drive after menopause, a condition called hypoactive sexual desire disorder (HSDD). This is currently the only evidence-based indication for testosterone therapy in women, according to a global consensus statement published in the Journal of Clinical Endocrinology & Metabolism. At physiological doses, testosterone therapy increases satisfying sexual events by roughly one per month on average, along with improvements in desire, arousal, and orgasmic function.
Transmasculine individuals take testosterone at higher doses as part of gender-affirming hormone therapy, aiming for masculinizing effects. And some women use testosterone without medical supervision for athletic performance or body composition goals. The effects described below apply across all these scenarios, though dose makes a significant difference in how quickly and intensely they appear.
Notably, research has found no effect of testosterone therapy on general wellbeing or depressed mood in women. It does not appear to improve cognitive performance or delay cognitive decline either, despite popular claims to the contrary.
Early Physical Changes
The first changes most women notice are increased skin oiliness, acne, and a higher sex drive. These tend to appear within weeks. Testosterone stimulates the sebaceous glands in skin, which is why breakouts are common, particularly along the jawline, back, and chest. Libido often increases noticeably, even at relatively low doses.
Body fat begins to shift over the first few months. Fat redistributes away from the hips and thighs and toward the abdomen, giving a more angular body shape. At the same time, testosterone acts on androgen receptors in skeletal muscle, which are present throughout the body. Lab studies on female muscle cells show that androgen receptor content increases and receptors move into the cell nucleus within 24 hours of testosterone exposure, jumpstarting muscle protein synthesis. Over weeks and months, this translates into increased muscle mass and strength.
Facial and Body Hair Growth
Hair changes are among the most predictable effects. In one study of 284 women on testosterone implant therapy, 92% reported some increase in facial hair growth. This typically begins as fine hair on the upper lip and chin and can progress to coarser, darker growth in a beard pattern at higher doses. Body hair on the arms, legs, chest, and abdomen also tends to increase.
Facial and body hair growth is considered permanent. Even after stopping testosterone, most of the new hair follicles that have been activated will continue producing hair, though the growth may become somewhat finer over time.
Voice and Clitoral Changes
At higher testosterone levels, two particularly significant changes can occur: the voice deepens and the clitoris enlarges. Both are classified as permanent. Voice deepening happens because testosterone thickens the vocal cords, and once that structural change occurs, it does not reverse when the hormone is stopped. This is one of the reasons low-dose prescriptions are carefully monitored.
Clitoral growth varies considerably between individuals and depends on dose and duration, but any enlargement that occurs is likewise irreversible.
Effects on Periods and Fertility
Testosterone suppresses the hormonal signaling chain between the brain and ovaries, disrupting or stopping ovulation. A study published in the American Journal of Obstetrics and Gynecology tracked 32 transmasculine individuals starting testosterone and found that anovulation occurred rapidly in a significant proportion of new users. Out of 61 combined months of testosterone use, only a single confirmed ovulation was observed.
However, testosterone is not a reliable contraceptive. Some long-term users do break through the hormonal suppression and ovulate, particularly if doses are inconsistent. About 41% of participants in that study still experienced some bleeding or spotting, and several showed hormonal patterns suggestive of dysfunctional ovulatory cycles. Pregnancy remains possible for anyone with a uterus and ovaries who has intercourse with a sperm-producing partner, even while on testosterone.
Menstrual cessation itself is reversible. Periods typically return after stopping testosterone, though the timeline varies.
Effects on Hair Loss
Male pattern baldness, meaning thinning at the temples and crown, is a recognized risk of testosterone use in women. Planned Parenthood classifies it as a permanent change. However, the picture is more nuanced than the label suggests. A questionnaire study in the British Journal of Dermatology followed women on continuous testosterone therapy for over a year and found that no patient in the cohort reported new hair loss, even at blood testosterone levels averaging four times the upper limit of normal female production. In fact, among the 27% of women who had experienced hair thinning before starting testosterone, 63% reported hair regrowth on therapy.
Individual susceptibility to androgen-related hair loss varies significantly based on genetics, particularly sensitivity of hair follicles on the scalp to a testosterone byproduct called DHT. Some women will experience thinning; others will not.
Cholesterol and Heart Health
Testosterone’s effects on cardiovascular risk markers in women are mixed. A review of seven studies in the Journal of the Endocrine Society found that about half reported improvements in areas like lean body mass, muscle strength, and inflammatory markers. But roughly the same number reported unfavorable changes, particularly drops in HDL (the protective form of cholesterol), increases in visceral abdominal fat, and greater insulin resistance.
The HDL reduction appears fairly consistent across studies. Multiple trials found that testosterone, whether taken alone or combined with estrogen, lowered HDL cholesterol. Combined testosterone-estrogen therapy did reduce total and LDL cholesterol in some studies, but HDL still dropped. Over the long term, lower HDL levels are associated with higher cardiovascular risk, which is why ongoing monitoring matters for women on testosterone therapy.
What’s Reversible and What Isn’t
This is often the most important question for women considering testosterone. The changes break down cleanly:
- Permanent: Facial and body hair growth, voice deepening, clitoral enlargement, male pattern baldness (in those genetically susceptible)
- Reversible: Increased muscle mass and strength, body fat redistribution, skin oiliness and acne, menstrual cessation, increased sex drive
The reversible changes generally fade within months of stopping testosterone as hormone levels return to their baseline range. The permanent changes reflect structural alterations to tissues (vocal cords, hair follicles, genital tissue) that don’t remodel back to their original state. This distinction is especially important for women taking testosterone at higher doses, since permanent changes become more likely with prolonged exposure above the normal female range of roughly 15 to 46 ng/dL of total testosterone.
How Dose Shapes the Experience
A woman taking a low, physiological dose of testosterone for sexual health after menopause will have a very different experience than someone taking masculinizing doses for gender-affirming care. At low doses kept within the normal premenopausal range, the main effects are usually a modest boost in sexual desire, possibly some increased skin oiliness, and slight changes in body composition. Virilizing effects like voice changes or significant hair growth are uncommon at these doses, though they can still occur in sensitive individuals.
At higher doses that push testosterone well above the female physiological range, masculinizing changes become more pronounced and develop faster. Muscle growth, fat redistribution, facial hair, and voice deepening all accelerate. The timeline varies by individual, but most people on full masculinizing doses see noticeable voice and hair changes within 3 to 6 months, with changes continuing to develop over several years. Only about 1 to 3% of circulating testosterone is “free” and biologically active at any given time, with the rest bound to carrier proteins, so the body’s response depends not just on the total dose but on how much free testosterone is actually available to act on tissues.