Screening

At the first prenatal visit, ABO blood type, RhD type, and red blood cell (RBC)-antibody screening is recommended for all pregnant women.[21][31]​​ Repeated RhD-antibody testing for all unsensitized RhD-negative women is also recommended at 24-28 weeks’ gestation, unless the biologic father is known to be RhD-negative.[31]

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