title: On the site of origin of erythropoietic factors in human fetal tissues.
mesh_terms: D002478:Cells, Cultured; D004921:Erythropoietin / Q000096:biosynthesis*; D005260:Female; D005333:Fetus / Q000378:metabolism*; D005865:Gestational Age; D006801:Humans; D007501:Iron / Q000378:metabolism; D007668:Kidney / Q000378:metabolism*; D008099:Liver / Q000166:cytology / Q000378:metabolism*; D008168:Lung / Q000378:metabolism*; D009928:Organ Specificity; D011247:Pregnancy; D013997:Time Factors
chemical_list: D004921:Erythropoietin; D007501:Iron