BACKGROUND-Rhesus incompatibility refers to the discordant pairing of maternal and fetal Rh type.It is associated with the development of maternal Rh sensitization and hemolytic disease of the neonate.(HDN).This phenomenon becomes clinically significant if a mother is Rh –negative becomes sensitized to the D antigen and subsequently produces anti-D antibodies that can bind to and potentially lead to the destruction of Rh-positive erythrocytes.4