PVP-I注入による後分娩乳牛の早期生殖機能の回復

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The relation between the effect on postpartal intrauterine infusion of polyvinyl pyrolidone-iodine (PVP-I) on the early return of reproductive function and follicular development was investigated in this study we estimated the ovarian changes and the changes in milk progesterone, serum progesterone and serum inhibin levels. A positive correlation was found between the progesterone concentration in milk and that in serum. A negative correlation was found between the blood inhibin concentration and the blood and the milk progesterone concentrations. Thus, the progesterone and the inhibin levels were reflected the ovarian changes. Infusion of PVP-I into the uterine cavity at Day 10 after parturition led to the early return of reproductive function, namely, within 30 postpartal days, in 6 of the 8 cows examined. Luteinization began following intrauterine infusion of PVP-I. This was followed by the elevation of blood progesterone level. Then, the follicle tended to develop and discharge an ovum, after the serum inhibin level was decreased. The number of days required for impregnation after delivery was 51.4 ±9.4 in the 8 cows treated by PVP-I infusion. The interval from delivery to impregnation in these cows was significantly shortened compared to 90.0 ±32.7 days in 60 untreated dairy cows reared under the same condition. These results demonstrate that infusion of PVP-I contributed to repair of the uterus, luteinization and early return of reproductive function in postpartum dairy cows.
信州大学の論文

PVP-I注入による後分娩乳牛の早期生殖機能の回復

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