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Test Code: Testo Preferred Name Testosterone

No
48Hrs
Every 2nd Weekday
72Hrs
Medicare Item
N/A

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Blood (adult)4 mLSST with gel 8.5 mL (Dark Yellow Top)
Blood (paediatric)1.5 mL3x SST with gel 600 uL Paed (Red or Yellow top)
Blood (neonatal)1.5 mL3x SST with gel 600 uL Paed (Red or Yellow top)

COLLECTION NOTES

In MALES, blood for testosterone measurement should be collected as an early morning specimen, between 6 and 9 am.
Only serum can be used.

GENERAL NOTES



APPLICATION:  Assessment of hirsutism or virilisation in females; investigation of testicular failure or precocious puberty in males.

INTERPRETATION:  Increased levels may be found in women with hirsutism or virilisation and in (phenotypic) women with total androgen insensitivity.  Levels are increased in males with precocious puberty.  Decreased levels are found in males with testicular failure, either primary or secondary to hypopituitarism.  

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