Most people associate testosterone with men. Testosterone is the male hormone — that's the cultural script. But women produce testosterone too, and when levels fall, the effects are real, measurable, and significantly underdiagnosed.
Low testosterone in women isn't a fringe condition. It's common, especially after 40, and its symptoms — fatigue, low libido, difficulty building lean muscle, brain fog, flat mood — are routinely attributed to "just getting older" or dismissed entirely.
This is the case for testosterone therapy in women.
Women Have Testosterone — And They Need It
Women produce testosterone primarily in the ovaries and adrenal glands. Levels are lower than men's — typically 15-70 ng/dL compared to 264-916 ng/dL in men — but testosterone is biologically active and essential.
Testosterone in women supports: - Libido and sexual function — this is perhaps the most well-documented effect. Testosterone is the primary driver of sexual desire in women, just as in men - Muscle mass and body composition — testosterone signals muscle protein synthesis. Low levels make resistance training less productive - Bone density — alongside estrogen, testosterone helps maintain bone mineral density. Low T is a risk factor for osteoporosis - Energy and fatigue — women with low testosterone commonly report persistent fatigue that doesn't respond to sleep changes - Cognitive function — brain fog, concentration difficulty, and word-finding problems are associated with hormonal decline - Mood stability — testosterone contributes to a sense of drive and wellbeing. Low levels correlate with flat affect and loss of motivation
When Do Women Develop Low Testosterone?
Testosterone levels in women decline gradually with age, starting in the late 20s and accelerating significantly in the 40s. The decline isn't as dramatic as male hypogonadism, but the consequences accumulate.
The main triggers for significant testosterone decline in women:
Natural menopause: The ovaries are major testosterone producers. As ovarian function winds down before and during menopause, testosterone falls along with estrogen and progesterone. Many perimenopausal women notice libido changes and fatigue before other menopause symptoms.
Surgical menopause (oophorectomy): Removal of the ovaries creates an abrupt, dramatic drop in both estrogen and testosterone. Women who undergo oophorectomy before natural menopause often experience more severe symptoms.
Oral contraceptives: This is one of the most underrecognized causes. Combined oral contraceptives increase SHBG (sex hormone binding globulin), which binds to free testosterone and reduces the amount of active hormone available. Some women on long-term OCPs develop what's sometimes called "post-pill sexual dysfunction" — low libido that persists even after stopping the pill.
Postpartum period: Testosterone drops significantly after delivery, contributing to postpartum fatigue and libido changes alongside estrogen and progesterone shifts.
How to Know If You Have Low Testosterone
Testing is more complicated in women than in men for two reasons: normal ranges aren't well-standardized for women, and total testosterone alone doesn't tell the whole story.
The most useful labs for women: - Total testosterone — morning draw (testosterone has a diurnal rhythm in women too) - Free testosterone — often more clinically relevant given high SHBG variability - SHBG — determines how much testosterone is actually bioavailable - Estradiol and progesterone — full hormonal context - DHEAS — adrenal androgen precursor; low DHEAS alongside low testosterone suggests adrenal contribution
Symptoms matter as much as labs. A woman with total testosterone of 20 ng/dL and significant fatigue, low libido, and difficulty maintaining muscle is clinically different from one with the same number but no symptoms.
What Female Testosterone Therapy Actually Looks Like
The most evidence-backed delivery methods for women:
Low-dose testosterone cream/gel: Applied to the inner thigh, labia, or clitoral hood. Allows precise, small dosing. Most commonly used method in female HRT.
Subcutaneous pellets: Implanted under the skin every 3-6 months. Provides steady delivery without daily application. Dose is harder to adjust quickly.
Compounded formulations: Because pharmaceutical-grade female testosterone products aren't as standardized as male TRT, compounded testosterone in appropriate doses is commonly used under physician supervision.
Doses for women are dramatically lower than for men — typically starting at 1-5mg/day equivalent, compared to the 100-200mg/week range in male TRT.
Side Effects to Watch For
At appropriate doses, testosterone therapy in women is well-tolerated. Excess dosing can cause:
- Acne (usually mild at therapeutic doses)
- Increased facial or body hair (hirsutism)
- Voice changes (rare at appropriate doses)
- Clitoral sensitivity changes
These effects are dose-dependent and largely reversible if the dose is adjusted. The key is starting low and titrating based on symptoms and labs — which is exactly what good clinical management looks like.
The Evidence: What Does Research Say?
The research on testosterone therapy for women is most robust for hypoactive sexual desire disorder (HSDD) — the medical term for low libido. Multiple randomized controlled trials show significant improvement in sexual desire, satisfaction, and response with testosterone therapy in post-menopausal women.
Evidence for other outcomes (muscle mass, fatigue, mood) is real but less extensively studied than the sexual function data. Clinical experience strongly supports benefits for energy and body composition in women with documented deficiency.
Who Should Consider Female Testosterone Therapy?
You may be a candidate if you: - Have documented low testosterone on labs (total T under 20-25 ng/dL, or low free T relative to SHBG) - Have symptoms consistent with androgen deficiency: low libido, fatigue, brain fog, difficulty building muscle - Are peri or postmenopausal - Have had ovarian surgery - Have been on oral contraceptives long-term and notice these symptoms
Testosterone therapy for women is most commonly offered in the context of broader hormonal evaluation — often alongside estrogen and progesterone management in menopausal women.
[Start a hormonal evaluation at Marrow](/start) to get a complete picture of your hormone levels and discuss whether testosterone therapy makes sense for your situation.
Frequently Asked Questions
Do women really need testosterone?
Yes. Women produce testosterone naturally in the ovaries and adrenal glands. It plays important roles in libido, muscle mass, bone density, energy, and mood. When levels fall — commonly in perimenopause, after ovary removal, or on long-term oral contraceptives — symptoms are real and treatable.
Will testosterone therapy make me look more masculine?
At appropriate female doses, masculinizing side effects are rare. Doses used in women are dramatically lower than in men. Some women notice minor increases in body hair or acne at higher doses, both of which are reversible with dose adjustment.
How do I know if I have low testosterone as a woman?
Blood testing plus symptom evaluation. Useful labs include total testosterone, free testosterone, and SHBG. Symptoms that suggest low testosterone include low libido, persistent fatigue, difficulty building muscle, brain fog, and flat mood — especially if these developed over time or after a hormonal shift like menopause or starting the pill.
Can oral contraceptives lower testosterone in women?
Yes. Combined oral contraceptives increase SHBG, which binds to free testosterone and reduces the bioavailable amount. Some women on long-term OCPs develop low libido and fatigue as a result. These symptoms sometimes persist after stopping the pill ('post-pill syndrome') until SHBG normalizes.
Is testosterone therapy FDA-approved for women?
There is no FDA-approved testosterone product specifically for women in the US, though testosterone therapy for women is widely used off-label based on clinical evidence. Physicians commonly prescribe compounded low-dose testosterone under individual care.
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