Haematological values can help clinicians and experts for diagnosis of disease and some other researches (eg. breeding management). We tried to get some haematological values of Lori - Bakhtiari sheeps and found some effects of different conditions on these .‘values. Fordetermination the weaning, season, sex, and kind of birth effects on RBC , WBC, MCV, MCH, MCHC, PLT and differentiation table, we examined blood samples from 281 lambs, 180 rams and 582 ewes. These samples were examined by ‘Technicon Haematology One (H1) instrument. RBC, WBC, MCV, and differentiation table had significant differences between pre and post weaning. Season had cosidarble effects on haematological values of rams and ewes. Age affected WBC, RBC, HCT values of rams and WBC, Hb, and PLT values of ewes. Sex effects on neutrophils, monocytes and eosinophils values were significant. Most parameters of lambs differed with matured sheep.
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