Protection Against Rh D‐Haemolytic Disease of the Newborn by a Diminished Transport of Maternal IgG to the Fetus

Abstract
IgG present in the circulation of newborn infants is predominantly of maternal origin. In cases of severe Rh D alloimmunization, the maternal anti-D antibodies may lead to Rh D-haemolytic disease of the newborn. However, an impaired placental transport of maternal IgG could be associated with the protection of the fetus/newborn against haemolytic disease as shown in this case report.