Testosterone Test
A blood test that measures testosterone, a male hormone also present in women.
Quick Summary
To investigate low sex drive, erectile problems and fertility in men, and excess hair or PCOS in women.
Total (and sometimes free) testosterone.
Morning sample, ideally fasting.
Overview
Testosterone is highest in the morning.
Low results are usually repeated.
What It Measures
Testosterone
Hormone level.
How It's Performed
- 01
Preparation
Usually no special preparation unless your doctor advises.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm.
- 03
Afterwards
Press on the spot; a small bruise is common.
Interpreting Results & Next Steps
Discuss with Doctor
Normal ranges differ between laboratories; use the range on your report. Your doctor will explain what your result means and what happens next.
If values are Low:
Low levels in men may cause tiredness and low libido.
If values are High:
High levels in women can suggest PCOS.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Testosterone Levels Test(opens in a new tab) · MedlinePlus, US National Library of Medicine