What can a total testosterone test tell you?
The results of a total testosterone test will not diagnose a condition. But the information can provide important clues about a woman’s hormonal health that can guide the next steps.
Providers may order a total testosterone test for women to:
Evaluate androgen excess. Androgen excess may contribute to symptoms of PCOS, including acne, scalp hair thinning, hirsutism (excess hair growth), or irregular periods.
Support fertility evaluation. Elevated or abnormal testosterone levels, which are common in women with PCOS, can interfere with ovulation.
Assess androgen deficiency. Very low testosterone in women has associations with fatigue, decreased sexual desire, and bone loss.
Monitor therapy. Providers may order testosterone labs while tracking the effects of hormone replacement therapy or other medications that affect androgen levels.
Investigate underlying disorders. Abnormal testosterone may prompt evaluation for underlying disorders, such as congenital adrenal hyperplasia, Cushing’s syndrome, or — rarely — androgen-secreting tumors.
What is being tested?
The total testosterone test measures the sum of free and bound testosterone in the bloodstream.
Bound testosterone: Most testosterone is attached to proteins, primarily SHBG. This bound portion is biologically inactive, meaning your body can’t use it.
Free testosterone: A small fraction of testosterone circulates in females unattached and is biologically active. This means it can bind to receptors and exert effects in the body.
Because SHBG levels vary with age, weight, thyroid function, and medications, the “free” amount of testosterone available to act in tissues may not always align with the total amount. For that reason, providers often order total testosterone alongside free testosterone and SHBG to get a clearer picture of a woman’s hormonal profile.
Where is the testosterone test typically included?
The total testosterone test is not a standard part of standard panels like the basic metabolic panel (BMP) or comprehensive metabolic panel (CMP). Instead, it is usually included in:
Reproductive hormone panels. These may also measure estradiol, progesterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH).
Androgen evaluation panels. This lab work is often bundled with free testosterone and SHBG.
Fertility and PCOS workups. Providers often order testosterone testing with LH and prolactin to evaluate menstrual cycle disturbances or infertility.
Who should get a testosterone test?
A provider may recommend a total testosterone test if you have signs or symptoms of hormone imbalance.
Common signs of high testosterone in women include:
Irregular or absent menstrual cycles
Acne
Hirsutism (excess facial or body hair)
Scalp hair thinning (female-pattern hair loss)
Infertility
Signs of low testosterone in women include:
Low libido or decreased sexual satisfaction
Fatigue and reduced energy
Loss of muscle strength or bone density (especially after menopause)
Providers may also recommend getting tested if they suspect you have an endocrine condition like PCOS, adrenal disorders, or an androgen-secreting tumor.