Observations on the Changes in the Kinetics of Red Cell Proliferation Following Irradiation and Hypertransfusion

Data are presented on the changing pattern of the Fe⁵⁹ uptake and emergence curve following irradiation and hypertransfusion. The data obtained appear to be inconsistent with the notion that population pressure influences the release of red cells from the marrow. The implications of these data on the understanding of the kinetics of red cell production are discussed.