Serum biochemical and enzymatic studies during different stages of pregnancy in cows

Serum biochemical and enzymatic profile of 20 cows in three different stages of pregnancy and non-pregnancy (control) was studied. The serum glucose values (mg/dl) obtained for the first, second and third trimester of pregnancy and in non-pregnant animals evinced a significant difference (p<0.05). The total protein concentration did not reveal any significant variation between groups. The serum cholesterol values differed significantly (p<0.05). The serum ALT value (U/L) at 3^rd trimester was significantly higher than the values at 1^st and 2^nd trimester and in non-pregnant group of animals. AST activity (U/L) also differed significantly.