<Li> a polychromatophilic or intermediate normoblast, then </Li> <Li> an orthochromatic or late normoblast . At this stage the nucleus is expelled before the cell becomes </Li> <Li> a reticulocyte . </Li> <P> The cell is released from the bone marrow after Stage 7, and so in newly circulating red blood cells there are about 1% reticulocytes . After one to two days, these ultimately become "erythrocytes" or mature red blood cells . </P>

Which hormone stimulates the production of erythrocytes in myeloid tissues