Rho immune globulin will be ordered after birth if which situation occurs?

A. Rho(D) immune globulin (RhoGAM) is indicated when an Rh-negative mother gives birth to an Rh-positive infant. This prevents the mother’s immune system from developing antibodies against Rh-positive blood cells, which could cause hemolytic disease of the newborn (HDN) in future pregnancies. B. An Rh-positive mother already has the D antigen, so she will not form antibodies against an Rh-negative baby. RhoGAM is not needed. C. The mother is Rh-positive and cannot develop antibodies against Rh-positive fetal blood cells. No RhoGAM is required. D. Both mother and baby are Rh-negative, so there is no risk of maternal sensitization. RhoGAM is not indicated.