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  • Title: The prophylactic use of vitamin D3 in parturient paresis in the cow in a practice district in eastern Norway. A retrospective investigation.
    Author: Mosdøl G, Skeie AH.
    Journal: Nord Vet Med; 1978 Feb; 30(2):83-9. PubMed ID: 204908.
    Abstract:
    The prophylactic effect in parturient paresis of an intramuscular injection of 10 million i.u. vitamin D3 one week prior to the expected calving date, was investigated in 84 cows which had previously suffered from parturient paresis. Clinical observations in connection with the development of parturient paresis after injection of vitamin D3 were compared with corresponding observations made on cows within the same population at the previous calving when no vitamin D3 was administered. The incidence of clinical parturient paresis in cows given vitamin D3 was 44.3 per cent. There were no significant differences in the incidence of parturient paresis in cows injected with vitamin D3 during the periods less than 2, 2--4, 5--8 and greater than 8 days before parturition. Average plasma calcium levels (mg/100 ml) before first calcium treatment, results of treatment, and the incidence of retained placenta in vitamin D3 injected cows did not differ significantly from corresponding data for cows with clinical parturient paresis which had not been given vitamin D3 before calving. It is concluded that vitamin D3 does not have any prophylactic effect in parturient paresis in cows in Eastern Norway.
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