Changes in Blood Parameters from Birth to Weaning in Male and Female Holstein Calves

Abstract

In this study, changes in biochemical parameters of Holstein calves at birth and weaning periods were examined. The average AST values at birth and weaning were 86.48 U/L and 94.44 U/L, respectively, showing a slight increase in enzyme levels. GGT levels were 32.62 U/L at birth and 25.70 U/L at weaning, indicating stabilization of liver functions compared to birth. Cholesterol (KOL) averages showed a slight increase from 150.55 mg/dL at birth to 155.70 mg/dL at weaning. Glucose (GLU) levels decreased from 56.88 mg/dL at birth to 38.60 mg/dL at weaning, reflecting changes in energy metabolism. Calcium (Ca) levels were 11.10 mg/dL at birth and 10.89 mg/dL at weaning, while phosphorus (P) levels were measured as 8.82 mg/dL at birth and 8.39 mg/dL at weaning. Magnesium (Mg) averages decreased from 2.68 mg/dL at birth to 2.31 mg/dL at weaning. Total protein (TP) values were 8.03 g/dL at birth and 7.23 g/dL at weaning; albumin (ALB) remained stable at 3.47 g/dL at both periods. Blood urea nitrogen (BUN) levels were 10.56 mg/dL at birth and 10.43 mg/dL at weaning, showing stability. These averages indicate physiological changes in some biochemical values in Holstein calves as they age.