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Effect of timing of intrauterine insemination with frozen-thawed semen on conception rates in ewes

Published online by Cambridge University Press:  21 November 2017

R.C.F. Findlater ,
W. Haresign  and
R.M. Curnock
R.C.F. Findlater
Affiliation:
Department of Agriculture and Horticulture, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD
W. Haresign
Affiliation:
Department of Agriculture and Horticulture, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD
R.M. Curnock
Affiliation:
MLC Pig Breeding Centre, Thorpe Willoughby, Selby, N.YorksYOB 9HL
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Extract

The widespread use of artificial insemination (AI) in the United Kingdom sheep industry has been limited by the poor conception rates obtained after cervical insemination of frozen-thawed semen. The major problem in this respect is the impairment of sperm transport through the cervix, particularly when AI is used in conjunction with oestrus synchronisation.

Previous studies (Killeen and Caffery, 1982; Maxwell, 1984) have indicated that a laparo-scopic technique for intrauterine insemination in ewes may overcome such limitations. At the moment, however, sufficient data on the optimum time of insemination and sperm doses required to maximise fertility in British breeds are not available. The present study was conducted to establish the optimum time of intrauterine insemination using frozen-thawed semen.

Type
Reproduction
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1987 , March 1987 , pp. 27
Copyright
Copyright © The British Society of Animal Production 1997

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References

Curnock, R.M., Reed, H.C.B., Logue, D.N. and Maxwell, W.M.C. (1984) Anim. Prod. 38, 546 (Abstr.).Google Scholar
Killeen, J.D. and Caffery, G.J, (1982) Aust. Vet. J. 59, 95.CrossRefGoogle Scholar
Maxwell, S.M.C. (1984) In: Proc. Seminar on Reproduction in Farm Animals, Aust. Soc. Anim. Prod. pp. 176–180.Google Scholar
Maxwell, W.N.C., Curnock, R.M., Logue, D.N. and Reed, H.C.B. (1980) Theriogenology 14, 83–89.Google Scholar