Rho (D) immune globulin is available as a sterile, lyophilized or liquid gamma globulin (IgG) fraction containing antibodies to the Rh0 (D) antigen (D antigen) under the name Rhophylac (IM/IV). Immune globullin was purified via ion-exchange chromatography method and prepared from pools of human plasma, where the donors are Rho (D)-negative donors who have been immunized with Rho(D)-positive RBCs.