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Postpartum oestrus and serum progesterone and oestradiol-17 beta levels in beef cows whose calves were weaned early



Postpartum oestrus and serum progesterone and oestradiol-17 beta levels in beef cows whose calves were weaned early



Japanese Journal of Animal Reproduction 25(4): 183-188



In 14 beef cows whose calves were weaned at 3 days of age, the 1st postpartum ovulation occurred, on average, 12.4 days after calving, although it was not accompanied by overt oestrus in 9 cows. All cows, except one, exhibited overt oestrus at the 2nd ovulation. The 1st postpartum overt oestrus occurred, on average, 24.0 days after calving. The interval from 1st to 2nd ovulation averaged 17.6 days v 21.6 from 2nd to 3rd.

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Accession: 000953689

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