EN
The level of Pb, Cu and Zn was determined in 30 cows and their offspring which were pastured in the surroundings contaminated by copper-works. The process of transmission of Pb, Cu and Zn to foetuses during pregnancy and after parturition to calves with milk was observed. The concentration of Pb in the blood of calves in the second day of postnatal life showed a positive correlation (r=0.619) with the level of Pb in the blood and milk of their mothers. The content of Pb in the blood in the second day of post- -natal life was significantly higher than that in the 3rd and 6th day of life. The level of Cu and Zn in the blood of cows and their offspring was similar and did not change with age of calves.