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Some dairy cows display a pronounced reduction in first milk yield after estrus onset. The objective of this study was to evaluate the usefulness of the pronounced reduction in milk yield as an indicator of the optimal time for artificial insemination (AI). We confirmed that the frequency of a...

Koyama, K.; Koyama, T.; Matsui, Y.; Sugimoto, M.; Kusakari, N.; Osaka, I.; Nagano, M.
Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
Japanese Journal of Veterinary Research, 2017, 65, 2, pp 55-63

The effect of CIDR inclusion for seven days after timed artificial insemination (TAI) on reproductive performance was determined in Japanese Black cows. Ovulation was synchronized at one month after normal parturition and was subjected to TAI. Cows were divided into two groups with CIDR inclusion...

Kitahara, G.; Hidaka, K.; Suzuki, Y.; Mine, Y.; Kajisa, M.; Kobayashi, I.; Kamimura, S.
Japan Veterinary Medical Association, Tokyo, Japan
Journal of the Japan Veterinary Medical Association, 2011, 64, 11, pp 870-873