Rh(D) Blood Group

immunohematologyBlood HealthBlood

The Rh(D) type records whether red blood cells carry the RhD antigen. Cells that carry it are RhD positive and cells that do not are RhD negative. Being RhD positive is more common than being RhD negative.

Why it matters: Blood transfusions depend on donors and recipients having compatible blood types. In pregnancy, there may be problems if the pregnant person is Rh negative and is carrying a fetus whose blood is Rh positive.

Source · Cleveland Clinic — what it is, why it matters

Common questions

What is Rh(D) Blood Group?

The Rh(D) type records whether red blood cells carry the RhD antigen. Cells that carry it are RhD positive and cells that do not are RhD negative. Being RhD positive is more common than being RhD negative.

What might a high or low Rh(D) Blood Group mean?

Blood transfusions depend on donors and recipients having compatible blood types. In pregnancy, there may be problems if the pregnant person is Rh negative and is carrying a fetus whose blood is Rh positive.

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