Fetomaternal hemorrhage (FMH) is an obstetrical challenge. It is defined as a passage of fetal blood into the maternal circulation or vice versa, which might complicate pregnancy or delivery. Most cases of acute and chronic FMH are idiopathic in origin and involve uncomplicated near-term pregnancies. Yet, due to the lack of universal screening, heterogeneous clinical presentation and insufficient clinicians awareness, in some cases FMH may present as immediate fetal compromise or even stillbirth as the most devastating consequence. We made a review of the literature of the FMH clinical cases of fetal/neonatal death in order to focus on the available diagnostic tools and their limitations. Cardiotocography, biophysical profile, middle cerebral artery peak systolic volume and current laboratory tests were studied and evaluated as diagnostic tools for FMH. International guidelines are needed to help clinicians make a prompt identification of FMH. Moreover, a standardized management protocol is essential in order to improve fetal-neonatal outcomes.
Keywords: cardiotocography; fetomaternal hemorrhage; neonatal death; obstetrics Doppler; stillbirth.