Response to iron deficiency anemia is denoted by

The indicator for a response to iron therapy is reticulocytosis. The response to iron therapy varies, depending on the erythropoietin stimulus and the rate of absorption. Typically, the reticulocyte count should begin to increase within 4-7 days after initiation of therapy and peak at 1-1 1/2 weeks. Harrison 19e 629; ref Robbins 9/e pg 421