Impaired erythropoietin response in anemic premature infants.

Serum erythrepoietin (ESF) levels were An impaired ESF response in these infants measured by the polycythemic mouse may be an important factor in the pathsbioassay in a group of normal premature genesis of the anemia of prematurity. infants with physiologic anemia. No ESF Tissue oxygen requirements in the prewas detected in these infants, while a mature infant are probably met in some group of older an#{149}mic hildren with simiway despite diminished ESF production lar hematocrit values had elevated levels. and low hematocrit levels.