For preventionof Rh incompatability the mother injected with antiD_antibody why?
This develops passive immunity and prevents formation of anti D antibodies in mother's blood
Rhesus (Rh)-D negative women who deliver an Rh(D) positive baby or who are otherwise exposed to Rh(D) positive red cells are at risk of developing anti-D antibodies. Rh(D) positive fetuses/neonates of these mothers are at risk of developing hemolytic disease of the fetus and newborn (HDFN), which can be associated with serious morbidity or mortality. The immunoglobulin prevent the immunization of the mother against the fetus' red cell.