The further you progress in treatment most of the values on the CBC (complete blood count) will fluctuate over and under the reference intervals.
I just popped into the LabCorp site and did a print screen of one of my labs during treatment. Not sure which week but I think it was after I started Procrit so maybe week 18 or so.
Notice how many values are in the High column and how many are in the Low Column.
http://www.medhelp.org/user_photos/show/344614?personal_page_id=1282072
The two values we tend to pay particular attention to are
Hemoglobin (the 10th one down) [to check for Anaemia
Absolute Neutrophils Count (7th one down) to check for Neutropenia