Here's what I found:
Greater-than-normal values may mean:
A high reticulocyte count may indicate increased production of red blood cells by the bone marrow, which can be caused by rapid blood loss, a move to high elevation, or certain types of anemia resulting in increased destruction of red blood cells (hemolysis).
The reticulocyte count usually rises after successful treatment for pernicious anemia, iron-deficiency anemia, or folic acid deficiency anemia.
Here's the
link, but I'm not sure if it will work properly. Let me know if that jives. If not, I'll ask my mom for more detail. She's a lab tech, not a doctor, though.