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Blood group combination matrix

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The matrix below indicates the blood group combinations for your offspring and helps you understand why the blood group and Rh factors are relevant when choosing a donor. It also explains why, in case of rare blood groups, a clinic may take longer in finding an appropriate donor for you. If the blood group of your offspring is not relevant to you, feel free to let the clinic know, so that they consider this in their matching process.


Mother

O +

A +

B +

AB +

O -

A -

B -

AB -

Father

O +

O +
O -

A +
A -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -

O +
O -

A +
A -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -

A +

A +
A -
O +
O -

A +
A -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

A +
A -
B +
B -
AB +
AB -

A +
A -
O +
O -

A +
A -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

A +
A -
B +
B -
AB +
AB -

B +

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -

AB +

A +
A -
B +
B -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

O -

O +
O -

A +
A -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -

O -

A -
O -

B -
O -

A -
B -

A -

A +
A -
O +
O -

A +
A -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

A +
A -
B +
B -
AB +
AB -

A -
O -

A -
O -

A -
B -
AB -
O -

A -
B -
AB -

B -

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -
O +
O -

B +
B -
O +
O -

A +
A -
B +
B -
AB +
AB -

B -
O -

A -
B -
AB -
O -

B -
O -

A -
B -
AB -

AB -

A +
A -
B +
B -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

A +
A -
B +
B -
AB +
AB -

A -
B -

A -
B -
AB -

A -
B -
AB -

A -
B -
AB -

 

Blood group compatibility among donors

(source: American Red Cross)

If your blood type is . . .

 

Type

You Can Give Blood To

You Can Receive Blood From

A+

A+  AB+

A+  A-  O+  O-

O+

O+  A+  B+  AB+

O+  O-

B+

B+  AB+

B+  B-  O+  O-

AB+

AB+

Everyone

A-

A+  A-  AB+  AB-

A-  O-

O-

Everyone

O-

B-

B+  B-  AB+  AB-

B-  O-

AB-

AB+  AB-

AB-  A-  B-  O-

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