Fetal intra uterine death is a rare event (incidence 2/1000 births) , unexpected and psychologically painful for the couple and the healthcare team. In this difficult context, it is essential to understand the etiology of death to guide the management of subsequent pregnancies. Among the investigations, foetopathologic examination is essential, but the examination of the brain is not possible in more than half of the cases due to the cerebral maceration due to the incompressible delay between death and expulsion.