Coagulation and Fibrinolysis in Rhesus‐Immunized Mothers and Their Erythroblastotic Newborn Infants

A study of the parameters of coagulation and fibrinolysis in Rhesus D immunized mothers and their erythroblastotic infants gave the following results, on comparison with normal women delivered at term and their newborn infants and with prematurely delivered women and their newborn infants: A. Mothers: No influence of the Rhesus immunization upon the parameters of coagulation or fibrinolysis. B. Newborn infants: With increasing severity of erythroblastosis a decreasing platelet count and at the same time an increasing content of clot‐promoting components in the plasma. In addition, a reduced content of PP and factor V, but unchanged fibrinogen. Fibrinolytic activity was also reduced in erythroblastotic newborn infants. The causes of these changes are discussed.