<prompt> Erythropoetin in fetus is secreted by?LiverMarrowSpleenKidney  <response>: Sources of erythropoietin: Fetus: Liver Adult: Interstitial cells in peritubular capillary bed of kidneys 85. Perivenous hepatocytes in the liver 15. Brain protective effect against excitotoxic damage triggered by hypoxia. 