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Effect of bovine somatotropin (growth hormone) treatment on gonadotropin profiles and ovarian follicle populations during the postpartum period in beef cows in low body condition

Published online by Cambridge University Press:  24 November 2017

L.P. Andrade ,
S.M. Rhind ,
I.A. Wright ,
S.R. McMillen  and
T.K. Whyte
L.P. Andrade
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
S.M. Rhind
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
I.A. Wright
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
S.R. McMillen
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
T.K. Whyte
Affiliation:
Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
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Extract

Cows in low body condition exhibit a prolonged postpartum anoestrous period and a delayed return to normal follicular function (Prado et al 1990). Previous studies have shown that the effects of body condition on gonadotrophin profiles are inconsistent (Wright et al 1990; Rhind et al 1992) indicating that the effects of body condition on ovarian function cannot be explained by changes in gonadotrophin profiles alone. Since nutritional state influences growth hormone profiles which in turn can affect ovarian function (Gong et al 1991), it was postulated that the effects of body condition on the duration of postpartum anoestrus could be mediated through changes in profiles of this hormone.

The aim of the present study was to determine the effect of growth hormone on ovarian follicle development and associated gonadotrophin profiles in post-partum beef cows.

Type
Reproduction
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 89
Copyright
Copyright © The British Society of Animal Production 1993

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References

Gong, T.G., Bramley, T.A. and Webb, R (1991). Biology of Reproduction 75 941–949 Google Scholar
Prado, R., Rhind, S.M., Wright, I.A., Russel, A.J.F., McMillen, S.R., Smith, A.J. and McNeilly, A.S. (1990). Animal Production 51 103–108 Google Scholar
Rhind, S.M. Bramley, T.A., Wright, I.A. and McMillen, S.R. (1992). Reproduction. Fertility and Development 4. 515–522 CrossRefGoogle Scholar
Wright, I.A., Rhind, S.M., Whyte, T.K., Smith, A.J., McMillen, S.R. and Prado, R (1990). Animal Production 51 93–101.Google Scholar