In vivo erythropoiesis after cessation of erythropoietin therapy.

Simultaneous evolution of the hematocrit (closed diamonds, right scale), absolute reticulocyte count (open circles, left scale), sTfR (open triangles, left scale), and Epo (closed squares, left scale) in unmanipulated iron-overloaded rats after cessation of treatment with 150 U rHuEpo per day for 20 days. Results are expressed as percentages of the mean values measured on days 70 to 80.