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endocrinologyHas Critical Values
Total Testosterone
Total T· also: Total Testosterone, TT
Clinical Overview
Testosterone is the primary male sex hormone. In men, low testosterone (hypogonadism) causes fatigue, reduced libido, and muscle loss. In women, high testosterone may suggest PCOS or adrenal disorders.
Reference RangesWHO/IFCC standards
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Male | 300 – 1000 | ng/dL | — |
| Adults (18–64) | Female | 15 – 70 | ng/dL | — |
Also reported in: nmol/L.
Critical (Panic) Values
Critical Low: < 100 ng/dL. Values outside these limits require immediate clinical attention.
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Related Topics
hormoneshypogonadismPCOStestosterone