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Metabolic and endocrine responses of mature and adolescent ewes to plane of nutrition during early pregnancy

  • R.W. Annett (a1), A.F. Carson (a1) (a2) (a3), A.R.G. Wylie (a2) (a3) and M.A. McCoy (a2) (a4)

Extract

A high plane of nutrition during early gestation has a detrimental effect on the establishment of pregnancy in adolescent but not mature ewes. Elevated insulin levels in well-fed adolescent ewes have been implicated in maintaining the anabolic drive to maternal growth at the expense of foetal tissue synthesis (Wallace et al., 1997). The adipocyte hormone, leptin has effects on food intake, body weight stasis and the gonadotrophic axis and therefore may also, like insulin, be implicated in the establishment and success of pregnancy. The objectives of the current experiment were to investigate the effects of plane of nutrition in mature and adolescent ewes during the first month of pregnancy on changes in maternal concentrations of insulin, leptin and blood metabolites.

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Agricultural and Food Research Council (1993). Energy and Protein Requirements of Ruminants. An advisory manual prepared by the AFRC Technical Committee on Responses to Nutrients, CAB International, Wallingford, UK
Wallace, J.M., Silva, P. Da., Aitken, R.P. and Cruickshank, M.A., 1997. Maternal endocrine status in relation to pregnancy outcome in rapidly growing adolescent sheep. Journal of Endocrinology 155: 359368

Metabolic and endocrine responses of mature and adolescent ewes to plane of nutrition during early pregnancy

  • R.W. Annett (a1), A.F. Carson (a1) (a2) (a3), A.R.G. Wylie (a2) (a3) and M.A. McCoy (a2) (a4)

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