Blood Group (ABO & Rh Factor)
Test code: HMT0018
- Sample
- Blood
- Preparation
- No special preparation
- Report
- Within 3 Hours
- Processed
- Mon to Sun, by 06:00 PM
About this test
The Blood Group test identifies your ABO blood group (A, B, AB or O) and your Rh factor (positive or negative). You need to know your blood group for blood transfusions, surgery and pregnancy, and it is often required for official records.
Preparation & sample
No special preparation required.
What does this test measure?
- ABO group: whether your red blood cells carry the A antigen, the B antigen, both (AB) or neither (O)
- Rh factor: whether your red blood cells carry the RhD antigen. If they do, you are Rh positive; if not, you are Rh negative.
Together these give your blood group, for example B positive or O negative.
When should you get this test?
- Before surgery or a blood transfusion
- Early in pregnancy, to check the mother's Rh factor
- Before donating blood
- For documents such as a driving licence, school records or employment
- If you do not know your blood group
Understanding your results
- Your blood group is inherited from your parents and stays the same throughout life in almost all cases.
- O negative blood can be given to people of any group in an emergency.
- AB positive people can receive red cells from any group.
- If a pregnant woman is Rh negative and the baby's father is Rh positive, the baby may be Rh positive. Doctors usually give an injection (anti-D) during and after pregnancy to protect future pregnancies.
Before any transfusion, the hospital always does a separate cross-match test, even if you know your blood group.
Frequently Asked Questions
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How Home Collection Works
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- 2
We come to you
A trained phlebotomist collects your sample at home.
- 3
Tested at our trusted labs
Your sample is processed at one of our trusted labs.
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