Free Androgen Index

Alternative Names/Synonyms	FAI
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	FAI3, FAIP3

Clinical Significance (If applicable)

Estimating the amount of free testosterone in patients with polycystic ovarian syndrome.

The Free Androgen Index is calculcated via:
Total Testosterone/ Sex Hormone Binding Globulin

Specimen Requirements (Sample Type)

Serum, Plasma

Specimen Requirements (Volume (mL))

0.5 mL

Specimen Requirements (Tube Type)

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

Collection Requirements

Collection Instructions

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Calculated

Test Availability

24 hours a day, 7 days a week

STAT Turnaround Time

1 hour

Routine Turnaround Time

3 hours

Reference Ranges

Females: 0.02 - 0.12
Males: 0.22 – 0.86

In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688