Information about a laboratory test
Measures total testosterone in the blood; testosterone is present in both males and females.
Measures total testosterone in the blood; testosterone is present in both males and females.
Used to evaluate symptoms of low testosterone in males, androgen excess in females, infertility, and pubertal disorders.
Low testosterone depends on sex, age, and sampling time; in males, a low result is often confirmed with a repeat morning measurement.
High testosterone in females may accompany androgen-excess features; in males, medicines/supplements and less common causes are considered.
Use the reference interval printed on your own laboratory report first. Hormone results may vary with the assay, age, sex, pregnancy, menstrual-cycle phase, and sampling time.
>= 249 – <= 836 ng/dL
Example reference interval
This is an example total-testosterone interval from the cited source. Age, sex, assay method, and especially sampling time can affect interpretation.
>= 193 – <= 740 ng/dL
Example reference interval
This is an example total-testosterone interval from the cited source. Age, sex, assay method, and especially sampling time can affect interpretation.
>= 8.4 – <= 48.1 ng/dL
Example reference interval
This is an example total-testosterone interval from the cited source. Age, sex, assay method, and especially sampling time can affect interpretation.
>= 2.9 – <= 40.1 ng/dL
Example reference interval
This is an example total-testosterone interval from the cited source. Age, sex, assay method, and especially sampling time can affect interpretation.
Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.
Most testosterone is protein-bound. If total testosterone does not fit the clinical picture, SHBG/free-testosterone context may be useful; sampling time matters.
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