Blood Group (ABO & Rh)
Also known as: ABO and Rh, Blood typing, blood group test, khoon ka group
Finds your ABO blood group (A, B, AB or O) and whether you are Rh (D) positive or negative.
Why it's ordered
Before blood transfusion or surgery, in every pregnancy, before donating blood, and for records.
Preparation
No preparation needed.
Typical adult values
| Result | One of A, B, AB or O, each Rh positive or Rh negative. There is no 'normal' group. |
|---|
Ranges vary between labs and methods. Always use the range printed on your report.
If you are Rh negative
Rh negative is not a disease. It matters in pregnancy: an Rh-negative mother carrying an Rh-positive baby can make antibodies that harm later pregnancies. This is prevented with an anti-D injection, so tell your doctor early in pregnancy.
Good to know
Before any transfusion, the hospital always repeats the grouping and does a crossmatch, even if you know your group. Your blood group cannot be changed by diet, and it does not decide your personality or what you should eat.
Common questions
Is Rh negative dangerous?
Rh negative is not a disease. It matters in pregnancy, where an anti-D injection prevents problems in later pregnancies.
Do I need a new blood group test before a transfusion?
Yes. Before any transfusion, the hospital always repeats the grouping and does a crossmatch, even if you know your group.
Which blood group is normal?
There is no 'normal' group. Everyone is A, B, AB or O, and Rh positive or Rh negative.
Can my blood group change?
No. Your blood group cannot be changed by diet.