the contribution of beta carotene reserves of the mother to the vitamin a stores of the foetus and to the beta carotene and vitamin a concentrations in blood serum of calves suggest that the main preventive method of beta carotene and vitamin a deficiency in calves should be high intake of beta carotene from daily ration fed to cows or rovimix -- beta carotene supplementation during late pregnancy of cows .
C0042839
vitamin a
C0042842
vitamin a deficiency