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The effect of feeding level during a 12-day progesterone-priming period on the viability of embryos collected from superovulated ewes.

Published online by Cambridge University Press:  24 November 2017

T.G. McEvoy ,
J.J. Robinson ,
R.P. Aitken ,
C.E. Kyle  and
I.S. Robertson
T.G. McEvoy
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
J.J. Robinson
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
R.P. Aitken
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
C.E. Kyle
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
I.S. Robertson
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Extract

Several studies have shown that the level of peri- and post-ovulatory progesterone in ewes can critically influence embryo survival (Ashworth, Sales & Wilmut, 1989; Parr, 1992). However, the effect of altering pre-ovulatory progesterone concentrations in superovulated sheep has not been fully investigated. In view of the inverse relationship between the plasma concentration of progesterone and food intake (McKelvey & Robinson, 1986; Parr, 1992), the present study was carried out to determine the effect of altering feed intake on progesterone concentrations during the pre-ovulatory priming phase and on the subsequent viability of ova collected from superovulated ewes.

Type
Ruminant Reproduction
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 57
Copyright
Copyright © The British Society of Animal Production 1993

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References

Ashworth, C.J., Sales, D.I. & Wilmut., I. (1989) J. Reprod. Fertil. 87: 23–32.Google Scholar
Lindner, G.M. & Wright, R.W. Jr.. (1983) Theriogenology 20: 407–416.Google Scholar
McKelvey, W.A.C. & Robinson, J.J.. (1986) Rowett Res. Inst. Ann. Rep. 41: 9–25.Google Scholar
McKelvey, W.A.C. et al. (1986) Theriogenology 25: 855–865.Google Scholar
Parr., R.A. (1992) Reprod. Fertil. Dev. 4: 297–300.CrossRefGoogle Scholar