Intracranial hemorrhage in utero due to isoimmune neonatal thrombocytopenia.

A case is presented of isoimmune neonatal thrombocytopenia complicated by spontaneous intracranial hemorrhage in utero. Maternal platelets were found to be negative for the PLA1, Baka, and HLA-A2 antigens. The present case demonstrates that the classical conservative approach of elective cesarean section can not guarantee against this crippling event.