The aim of the study was to determine biologic variations main parameters in cows early lactation and compare intra-individual other species. 50 were included experiment. Blood samples taken at moment calving, then on 1st, 7th, 14th 28th day after calving. CVi had following values: 1.9-5% for MCV, MCH, MCHC, GLU, TProt, ALB, UREA, Ca, P Mg; 5.1-10% RBC, Hgb, Hct, WBC, NEU, LYM, BHB, ALT, CHOL, ...