Antenatal Treatment of Neonatal Alloimmune Thrombocytopenia

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Abstract
Neonatal alloimmune thrombocytopenia results from the formation of a maternal antibody to a paternal antigen on fetal platelets. Intracranial hemorrhage, which may be antenatal, occurs in approximately 15 to 20 percent of infants with this form of thrombocytopenia. In families with an affected infant, 75 percent of subsequent infants are affected. We report the results of antenatal treatment with intravenous gamma globulin, with or without dexamethasone, in seven pregnant women who had previously had infants who had severe alloimmune thrombocytopenia.