What is the difference between NRBCs and Reticuloytes?

NRBCs (nucleated red blood cells) are immature red blood cells that still contain a nucleus, typically seen in the blood of infants or in certain medical conditions. Reticulocytes are also immature red blood cells, but they have lost their nucleus. Reticulocytes are released from the bone marrow into the bloodstream to eventually mature into erythrocytes (mature red blood cells).