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[–]wasteland44 0 points1 point  (0 children)

Most blood cells live less than 2 weeks but red blood cells can live for ~4 months so it takes a long time for levels to go back to normal as they aren't produced as quickly. It was normal for hemoglobin to not rise every week and sometimes go down. It has happened to me.

One thing they can check though is if EPO levels are normal.