Why get tested?
To determine whether you have any blood group or red cell antibodies that need to be considered by the transfusion laboratory prior to a possible blood transfusion.

When to get tested?
If your doctor indicates that transfusion with blood or blood components may be required as part of your medical treatment, or as part of antenatal screening undertaken during pregnancy.

Sample required?
A blood sample drawn from a vein in the arm.

Frequency of testing
Your antibody screen will be performed prior to receiving a blood transfusion. Where medical treatment requires ongoing transfusions over a period of time, a group of tests (group and screen, crossmatch) will be repeated every 72 hours in order to reduce the possibility of a transfusion reaction.