Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
Results are affected by recent clots, blood thinners, and pregnancy, so timing matters.
Why it's done
- Clots at a young age or without a clear cause
- Strong family history of clots
Getting ready and what happens
- Your provider will choose timing around blood thinner treatment.
How the test is done
- A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.
What the results mean
Low
May point to an inherited clotting tendency; a specialist can advise on prevention.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related medicines
Related tests
Sources
Last updated 2026-11-13.