The knowledge of hematological values is useful in diagnosing various pathological and metabolic disorders, which can adversely affect reproductive performance of cows. The aim of this study was to investigate body condition score (BCS), body weight, calves weight, blood erythrocyte parameters and total and differential leukocyte count changes in dystocia-affected (n=35) and normally calved (n=20) crossbred dairy cows.  Values of mean corpuscular volume (MCV) and neutrophil counts were markedly increased (P<0.001) in the dystocia group compared to normal birth group. The levels of mean corpuscular haemoglobin concentration (MCHC) and hematocrit in dystocia-affected cows were significantly lower (P<0.001) than normal parturition. However, in cow suffering from dystocia, counts of the white blood cells (WBC), red blood cells (RBC), haemoglobin concentrations, mean corpuscular haemoglobin (MCH), eosinophils, basophils, lymphocytes and monocytes were not different from the normal parturition group. In cows with dystocia, BCS, age and parity of dams did not show significant difference compared to normal parturition. However, body weight in cows with difficult calving was lower (P<0.05) than spontaneous calving cows. These results suggest that hematocrit, MCV, MCHC and neutrophil counts were significantly affected due to dystocia in cattle. BCS, age and parity of parturition animals observed in the our study had no affect on dystocia.

Key words: Body condition score; Calf weight; Crossbred Cattle; Dystocia; Hematological profile