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The prevalence of D alloimmunization occurs between 0.15% and 0.4%. The anti-D can cross the placenta and cause hemolysis and fetal anemia. At present, a Doppler study of the middle cerebral artery allows the monitoring of the degree of fetal anemia. The treatment in cases of moderate to severe anemia in fetuses of less than 34–35 weeks of gestation is intrauterine transfusion via cordocentesis. However,...