Possibility of the prediction of parturition from the prepartum concentrations of steroid hormones in blood plasma of cows
2017
Kamada, H. (Institute of Livestock and Grassland Science NARO, Tsukuba (Japan)) | Matsui, Y.
Relationship between prepartum blood plasma steroid hormone concentrations and days (and hours) for parturition were investigated using Holstein pregnant cows. The concentrations of estradiol-17beta in blood plasma 7 or 10 days before the due date were highly correlated to the days until calving. When parturitions were occurred before the due date, the concentrations of progesterone and cortisol 7 days before the due date were highly correlated to the days until calving. On the other hands, the estradiol-17beta concentrations in blood plasma before dexamethasone injection were highly correlated to the time between calving and prostaglandin injection when artificial parturition was induced by dexamethasone and prostaglandin injections. These results suggested that we can expect the day of natural parturition and the time of induced parturition from the prepartum concentrations of estradiol-17beta in blood plasma of cows.
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