Prepartum circulating β–carotene and, more
importantly, vitamin E were lower for cows that
retained their placenta than for healthy cows (LeBlanc
et al., 2004). In fact, for every 1 μg/ml increase in
circulating vitamin E during the week preceding
parturition, the risk of retained placenta decreased by
21%. Furthermore, the decline in circulating
concentrations of β-carotene, vitamin A, and vitamin E
associated with parturition was more accentuated among
cows that developed mastitis during the first 30 days
postpartum than among healthy cows (LeBlanc et al.,
2004). In the last week prepartum, a 100 ng/ml increase
in circulating vitamin A concentration was associated
with a 60% decrease in the risk of clinical mastitis
(LeBlanc et al., 2004).
Prepartum circulating β–carotene and, moreimportantly, vitamin E were lower for cows thatretained their placenta than for healthy cows (LeBlancet al., 2004). In fact, for every 1 μg/ml increase incirculating vitamin E during the week precedingparturition, the risk of retained placenta decreased by21%. Furthermore, the decline in circulatingconcentrations of β-carotene, vitamin A, and vitamin Eassociated with parturition was more accentuated amongcows that developed mastitis during the first 30 dayspostpartum than among healthy cows (LeBlanc et al.,2004). In the last week prepartum, a 100 ng/ml increasein circulating vitamin A concentration was associatedwith a 60% decrease in the risk of clinical mastitis(LeBlanc et al., 2004).
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