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Effect of bovine somatotropin administration during the last trimester of gestation on maternal growth, and foetal and placental development in primigravid ewes

Published online by Cambridge University Press:  02 September 2010

K. Stelwagen ,
D. G. Grieve ,
J. S. Walton ,
J. L. Ball  and
B. W. McBride
K. Stelwagen
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
D. G. Grieve
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
J. S. Walton
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
J. L. Ball
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
B. W. McBride
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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Abstract

Twenty-five primigravid ewes were used in a preliminary study to investigate the effect of bovine somatotropin (bST) between 97 and 124 days of gestation, on maternaland foetal growthand development. Five ewes (reference group) were slaughteredat 96 days of gestation, and the remaining ewes were injected daily with saline (control group: no = 10) or 0·1 mg/kgbody weight of bST (bST group: no. = 10). Following bST treatment, five control- and five bST groupewes were slaughtered (slaughter group). The remaining ewes (production group) were allowed to lamb, after which the lambs were slaughtered within 2 h of birth. Bovine somatotropin reducedthe proportion of maternal body fat, but had no major impacton wool growth, maternal gain and gross skeletal measurements, and foetal growth and development. Maternal bST treatment tended to affect the number of placentomes. It should, however, be emphasized that these results are based on small numbers of animals and that further research in this area is required.

Keywords

body compositionewesfoetal growthplacentasomatotropin
Type
Research Article
Information
Animal Production , Volume 58 , Issue 1 , February 1994 , pp. 87 - 94
Copyright
Copyright © British Society of Animal Science 1994

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