Free Testosterone (Calc), Testosterone, SHBG, Albumin, FAI

Specimen Container

Gel separator tube (Adult)
Microtube (Paeds)

Specimen Requirement

Plain Blood
Adult: 5 mL
Paediatric: 1.3 mL

Invert blood 5 times after blood collection ensures the clot-activating factors is well mixed with the blood. This will ensure results are reliable.

Orderable as Urgent?

Turn Around Time

3 - 4 hrs

Reference Value(s)

Refer to test name, 'Testosterone' and 'Albumin'.

Sex Hormone Binding Globulin (SHBG) -
Females:

Age Group	Lower Limit (nmol/L)	Upper Limit (nmol/L)
1 month - < 1 year	36.2	229
1 - < 8 years	41.8	188.7
8 - < 11 years	26.4	162.4
11 - < 13 years	14.9	107.8
13 - < 15 years	11.2	98.2
15 - < 17 years	9.8	84.1
17 - < 19 years	10.8	154.6
19 years & above	11.7	137.2

Males:

Age Group	Lower Limit (nmol/L)	Upper Limit (nmol/L)
1 month - < 1 year	36.2	229
1 - < 8 years	41.8	188.7
8 - < 11 years	26.4	162.4
11 - < 13 years	14.9	107.8
13 - < 15 years	11.2	98.2
15 - < 19 years	9.7	49.6
19 years & above	11.2	78.1


Free Testosterone (Calculated using Vermeulen equation) -
19 years & above	Females	0.003 - 0.058 nmol/L
19 years & above	Males	0.180 - 0.994 nmol/L


Free Androgen Index (FAI) -
Pre-menopausal women: <= 7.3
Post-menopausal women: <= 8.0

Testing Laboratory Location

KKH

Laboratory

Clinical Chemistry

Contact Number

6394 1383

Day and Time Performed

Monday - Friday: 0800 - 1730 hrs
Saturday: 0800 - 1230 hrs

Orderable on CPOE?

Yes

Downtime Form

Clinical Chemistry - Form A

Change History Notes

27 May 2024 09:00 AM

Update of Specimen Requirement.
07 Oct 2022 12:00 AM

Updated Reference Value(s).
18 Oct 2021 03:10 PM

Updated Specimen Requirement, Turn Around Time and Reference Value(s).

Last Updated - 23 Apr 2025