[Fetomaternal macrotransfusion with severe fetal anemia].

A fetomaternal macrotransfusion endangers fetal life. This report describes a fetomaternal macrotransfusion of about 300 ml blood. Ante partum and intra partum monitoring showed a mild fetal tachycardia. After spontaneous delivery the newborn was severe anemic and has a mild hepatosplenomegaly and edema. The diagnosis of fetomaternal macrotransfusion was made by Kleihauer-Betke-Test with maternal blood.