[Fetal and neonatal alloimmune thrombocytopenia].

Fetal and neonatal alloimmune thrombocytopenia (FNAIT) may lead to intracranial haemorrhage (ICH) resulting in neurological damage or death. In FNAIT, transplacental maternal antibodies cause destruction of fetal platelets. Maternal immunisation occurs to fetal human platelet antigens (HPAs) inherited from the father. In the absence of screening the diagnosis often relies on a serious incident in a previous pregnancy or in a newborn sibling. Thus, a future reduction in the risk of ICH depends on prospective large trials to evaluate different diagnostic, treatment, and prevention strategies.