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A note on live-weight adjustment for pregnancy in cows

Published online by Cambridge University Press:  02 September 2010

M. W. Silvey  and
K. P. Haydock
M. W. Silvey
Affiliation:
Division of Tropical Crops and Pastures and Division of Mathematics and Statistics, CSIRO, Cunningham Laboratory, St Lucia, Brisbane, Australia 4067
K. P. Haydock
Affiliation:
Division of Tropical Crops and Pastures and Division of Mathematics and Statistics, CSIRO, Cunningham Laboratory, St Lucia, Brisbane, Australia 4067
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Abstract

Since comparison of live-weight change of breeding cows is complicated by pregnancy and reproductive synchrony, possible analytical methods for overcoming these problems were reviewed. It was concluded that correction of cow live-weight by subtracting the weight of the gravid uterus and products of conception was biologically and practically meaningful. Two exponential models using polynomial coefficients were derived from published data to predict the fresh weights, at any time during gestation, of the foetus (calculated from calf birth weight) and the gravid uterus and foetal membranes and fluids.

Type
Research Article
Information
Animal Production , Volume 27 , Issue 1 , August 1978 , pp. 113 - 116
Copyright
Copyright © British Society of Animal Science 1978

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References

REFERENCES

Arthur, G. H. 1964. Wright's Veterinary Obstetrics, Including Diseases of Reproduction, 3rd ed. Baillière, Tindal and Cox, London.Google Scholar
Edye, L. A., Ritson, J. B., Haydock, K. P. and Griffiths Davies, J. 1971. Fertility and seasonal changes in liveweight of Droughtmaster cows grazing a Townsville stylo-spear grass pasture. Aust. J. agric. Res. 22: 963–977.CrossRefGoogle Scholar
Ferrell, C. L., Garrett, W. N. and Hinman, N. 1976. Growth, development and composition of the udder and gravid uterus of beef heifers during pregnancy. J. Anim. Sci. 42: 1477–1489.CrossRefGoogle ScholarPubMed
Fitzhugh, H. A., Cartwright, T. C. and Temple, R. S. 1967. Genetic and environmental factors affecting weight of beef cows. J. Anim. Sci. 26: 991–1001.CrossRefGoogle ScholarPubMed
Koong, L. J., Garrett, W. N. and Rattray, P. V. 1975. A description of the dynamics of fetal growth in sheep. J. Anim. Sci. 41: 1065–1068.CrossRefGoogle ScholarPubMed
Lyne, A. G. 1960. Pre-natal growth of cattle. Proc. Aust. Soc. Anim. Prod. 3: 153–161.Google Scholar
Nichols, C. W. 1944. The embryology of the calf: fetal growth weights, relative age and certain body measurements. Am. J. vet. Res. 5: 135–141.Google Scholar
Swett, H. W., Matthews, C. A. and Tohrman, M. H. 1948. Development of the fetus in the dairy cow. United States Department of Agriculture Tech. Bull., No. 964.Google Scholar
Williams, W. T. and Edye, L. A. 1975. The analysis of reproductive records with use of labelled sequences, and its application to a grazing experiment. Aust. J. agric. Res. 26: 665–672.CrossRefGoogle Scholar
Winters, L. M., Green, W. W. and Comstock, R. E. 1942. The prenatal development of the bovine. Tech. Bull. Minn, agric. Exp. Stn., No. 151.Google Scholar