| | Introduction: Anemias Caused by Deficient Erythropoiesis: Merck Manual Professional |
 | | Anemias due to decreased erythropoiesis are recognized by reticulocytopenia, which is usually evident on the peripheral blood smear (see Approach to the Patient With Anemia: Testing). |
 | | The RBC indices, mainly the MCV, narrow the differential diagnosis of deficient erythropoiesis and determine what further testing is necessary. |
 | | Because erythropoiesis increases the iron requirement, supplemental iron is helpful when administering any type of treatment that aims to increase erythropoiesis. |
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