EN
Simmental is one of the two-direction breeds of milk-meat used due to its high growth values and muscularity. The aim of the study was to determine the level of hematological parameters in Simmental cattle from one herd of various age cattle by taking into consideration the period of pregnancy. Studies were conducted on 180 specimens: 90 cows at the age of between 3 to 8 years, 30 heifers, 35 calves and 25 pregnant cows, during the autumn. The following hematological parameters were determined: erythrocytes, leukocytes and platelets count, level of hemoglobin, haematocrit and red blood cell indicators. The analyzed level of basic hematological parameters corresponded with the cattle reference values. Red blood cell counts were lower but red blood cells indices values were increased. The values of hematological parameters in calves were lower in comparison with values noted in adult cows.