Very concerned. My hematocrit went from 51 to 57 in 4 months. My doctor thinks it's a lab error and has redrawn a CBC. He says an increase in 4 months that drastic just doesn't happen so quickly in his experience. I should know pretty quickly whether or not I need to visit the Red Cross to donate. My dose has been a consistent 100 mg IM cypionate weekly for the last year. I have stopped therapy. Anyone have similar experiences with hematocrit results or laboratory error out there?? Thank you.