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The effect of boar contact on the maintenance of cyclic activity in gilts after the hormonal induction of puberty

Published online by Cambridge University Press:  22 November 2017

P. J. Burnett  and
N. Walker
P. J. Burnett
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough. Co. Down
N. Walker
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough. Co. Down
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Extract

A single injection of 400 i.μ. pregnant mare's serum gonadotrophin (PMSG) plus 200 i.μ. human chorionic gonadotrophin (HCG) has been shown to induce puberty in a high proportion of gilts treated (Burnett and Walker, 198S). However, studies indicate that the hormone treatment may fail to initiate normal oestrous cycling after the pubertal ovulation. The work of Paterson and Lindsay (1981) has shown that housing gilts in contact with boars throughout the cycle after puberty induction will enhance the proportion of animals which maintain cyclic activity to a second ovulation. The purpose of the experiment reported here was to examine the effect of boar contact and the timing of the introduction of boar contact on the maintenance of cyclic activity after puberty induction by PMSG + HCG.

Type
Pig Production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1986 , March 1986 , pp. 122
Copyright
Copyright © The British Society of Animal Production 1986

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References

References:

Burnett, P.J. and Walker, N. (1985). Anim. Prod. 40, 546 (Abstr).Google Scholar
Paterson, A.M. and Lindsay, D.R. (1981). Anim. Prod. 32, 51–54.Google Scholar