The tocopherol serum levels of cows and horses in relation to reproduction
article
The tocopherol level in normal cows is not constant. It highly depends on nutrition. In grass feeding (summer) the level is about 80 μg/10 ml of serum. In winter 10-20 μg/10 ml. This level is independant of pregnancy, partus and lactation. There was a slight influence of age of the animals probably being of nutritional origin.
Cows aborting from Brucella infections showed no particular low tocopherol level. There is no reason to assume a vitamin E deficiency in these cases. Cows with Brucella infections hut not aborting had a normal tocopherol level. In sterile, nymphomanic and anaphroditic cows the tocopherol content was normal.
The administration of tocopherol, per os, intramuscular or intertracheal in doses, usually given in praxis, did not cause a rise of the tocopherol value in bloodserum. In pregnant and non-pregnant mares the tocopherol content of the bloodserum was much more constant and independant of summer and winter feeding. In sterile horses the value was the same. Although this investigation has given us a clear picture of the tocopherol level in blood under different conditions, no relation between this level and sterility occurring in farm animals was observed.
Cows aborting from Brucella infections showed no particular low tocopherol level. There is no reason to assume a vitamin E deficiency in these cases. Cows with Brucella infections hut not aborting had a normal tocopherol level. In sterile, nymphomanic and anaphroditic cows the tocopherol content was normal.
The administration of tocopherol, per os, intramuscular or intertracheal in doses, usually given in praxis, did not cause a rise of the tocopherol value in bloodserum. In pregnant and non-pregnant mares the tocopherol content of the bloodserum was much more constant and independant of summer and winter feeding. In sterile horses the value was the same. Although this investigation has given us a clear picture of the tocopherol level in blood under different conditions, no relation between this level and sterility occurring in farm animals was observed.
TNO Identifier
287989
Source
International review of vitamin research, 21(2/3), pp. 140-151.
Pages
140-151
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