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Testosterone Free

Alternative Names:Free Testosterone
Laboratory:Clinical Biochemistry
Test Code:FRTE
Specimen Types:Serum
Container Types:
SST
Transport Instructions between Sites and/or Laboratories:

n/a

Assay Frequency:Twice weekly
Additional Notes:

Reference Interval:

Adult Males:   260 -740 pmol/L

Adult Female: 3-37 pmol/L

Male Comment:

Free testosterone calculated using the Vermeulen equation (Ann Clin Biochem 2006; 43:389-397)

This reference interval is based on the study from Andrology Australia in eugonadal young men (Sikaris KA et al, J Clin Endocrinol Metab 2005; 90:5928-36.) There is an age related fall in free testosterone in healthy older men, whose calculated free testosterone may be as low as 140pmol/L.

Clinical correlation is required for interpretation of results

 

Female Comment:

Free testosterone calculated using the Vermeulen equation (Ann Clin Biochem 2006; 43:389-397)

This reference interval is based published data (Davison SL et al. JCEM  2005 Jul;90(7):3847-53.

Clinical correlation is required for interpretation of results