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Blood Group

What are blood groups?
A B and O are blood groups identified by the presence of a unique protein on the surface of a red blood cell.  These groups are important in selecting donors for blood transfusion.  There are 4 common blood types: A, B, O and AB.  The RH factor describes a protein that is also present on the surface of red blood cells.  The presence or absence of the RH protein makes the blood type + (if present) or - (if absent).  
When is blood type important?
Blood type is essential knowledge for all pregnant women and is routinely tested for in pregnancy.  Women that are RH negative require immunization with Rhogham medication during bleeding in pregnancy and at 28 weeks into a pregnancy. 
Who can I receive or donate my blood to?
The table below lists compatibility charts for blood groups and types.
Blood Type
Can Donate To
Can Recieve
A+
A+, AB+
A+, A-, O+, O-
A-
A+, A-, AB+, AB-
A-, O-
B+
B+, AB+
B+, B-, O+, O-
B-
B+, B-, AB+, AB-
B-, O-
AB+
AB+
All individuals
AB-
AB+, AB-
AB-, A-, B-, O-
O+
A+, AB+, A+, B+
O+, O-
O-
All individuals
O-

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Last modified 7mo ago

Blood Type	Can Donate To	Can Recieve
A+	A+, AB+	A+, A-, O+, O-
A-	A+, A-, AB+, AB-	A-, O-
B+	B+, AB+	B+, B-, O+, O-
B-	B+, B-, AB+, AB-	B-, O-
AB+	AB+	All individuals
AB-	AB+, AB-	AB-, A-, B-, O-
O+	A+, AB+, A+, B+	O+, O-
O-	All individuals	O-