Influence of the Pituitary on Hemopoiesis

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Abstract
The hypophysis has a profound influence on erythropoiesis which we believe to be secondary rather than primary. Post-hypophysectomy anemia, in our opinion, develops because of the loss of thyrotropic and adrenocorticotropic hormones and possibly of growth hormone. A theory has been presented that the loss of these hormones finally results in a decreased need for oxygen by the tissues which, in turn, causes a decrease in the rate of erythropoiesis in these animals.