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Monitoring reproductive performance in beef suckler cows by milk progesterone analysis.

  • G.E. Mann (a1), R. Keatinge (a2), M. Hunter (a1), B.A. Hedley (a2) and G.E. Lamming (a1)...

Extract

Milk progesterone monitoring in dairy cattle has provided a valuable insight into the reproductive cycle during the post-partum and mating periods (Lamming et al., 1981; Darwash and Lamming, 1997). In this study a similar approach was applied to suckler cows. The objective was to compare the reproductive performance of two contrasting genotypes with a view to improving output from commercial herds. Such herds produce an average of 91 live calves per 100 cows mated (MLC, 1996).

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Darwash, A.O. & Lamming, G.E. 1997. Abnormal ovarian patterns as a cause of subfertility in dairy cows. Cattle Practice 5: 37.
Lamming, G.E., Wathes, D.C. & Peters, A.R. 1981. Endocrine patterns in the post-partum cow. Journal of Reproduction and Fertility supp l30: 155170.
MLC 1996 Beef yearbook. Meat and Livestock Commission, 1996

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