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Double insemination is better. It improves the conception rate of cows with prolonged oestrus or delayed ovulation



Double insemination is better. It improves the conception rate of cows with prolonged oestrus or delayed ovulation



Tierzuchter 42(8): 346-347



For 196 741 first inseminations of cows inseminated once, the 56-day NR rate was 69.43% vs. 67.87 for 16 477 double inseminations, the corresponding CRs for 74 800 and 7746 second inseminations being 68.23 and 67.36%. When the double inseminations were carried out on the same day, the 56-day NR rate was 71.17% vs. 69.03, 67.81 and 60.39% when the interval between inseminations was 1, 2 and 3 days resp.

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