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Testosterone, total
Test CodeTEST
Preferred Specimen
Serum, 0.5 mL minimum
Transport Container
SST tube
Transport Temperature
Specimen stable for 8 hours at room temp., 2 days refrigerated and >2 days frozen.
Reference Range
See report for normal ranges.
Clinical Significance
Serum testosterone in males, along with serum LH assists in evaluation of hypogonadism, testicular failure, hyperprolactinemia and hypopituitarism. In females the normal levels of androgens may provide substrate for estrogen production.