A retrospective study in 71 cadaver renal transplant patients showed a significantly better 2-year graft survival rate (62%) in patients who received pretransplant transfusions or who were parous than in nontransfused patients or patients who have not been pregnant (29%). The beneficial influence of blood transfusion and of pregnancy is thus confirmed. An additive effect of blood transfuion and pregnancy is suggested by the results of this study.