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The use of allyl-trenbolone or a combination of PMSG and HCG to control oestrus and ovulation in groups of peri-pubertal gilts

Published online by Cambridge University Press:  21 November 2017

M.A. Varley ,
P.R. English ,
O. MacPherson ,
P. Pawley  and
F.H. Davidson
M.A. Varley
Affiliation:
Dept of Aninal Physiology and Nutrition, University of Leeds, LS2 9JT
P.R. English
Affiliation:
Dept of Agriculture, University of Aberdeen, AB9 IFX
O. MacPherson
Affiliation:
Dept of Agriculture, University of Aberdeen, AB9 IFX
P. Pawley
Affiliation:
Dept of Agriculture, University of Aberdeen, AB9 IFX
F.H. Davidson
Affiliation:
J.A.Simmers and Sons, Old Meldrum, Aberdeen
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Extract

In large scale commercial pig production the programmed replacement of culled sows by pregnant gilts is a major problem. Techniques for heat synchronisation in groups of gilts have been explored by a number of workers using a variety of materals such as methallibure, gonadotrophins and progesterone. One promising method involves the use of allyl-trenbolone as an agent for oestrous synchronisation (Varley, 1983; Stevenson and Davis, 1981). Another approach is to use a combination of gonadotrophins (PMSG and HCG) to induce ovulation and new oestrous cycles.

The purpose of this study was to compare the value of these two techniaues under the same commercial conditions.

Type
Manipulation of Reproduction
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1986 , March 1986 , pp. 51
Copyright
Copyright © The British Society of Animal Production 1986

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References

Stevenson, J.S. and Davis, D.L. (1981). Estrus synchronisation in gilts fed allyl-trenbolone 14 or 18 davs beginning 9 to 21 days post-estrus. J.Anim.Sci 53: (Suppl 1) 368–369 (abstr).Google Scholar
Varlev, M.A. (1983). The regulation of oestrous cvcles in orouos of post-pubertal female pios using allyl-trenbolone. Anin. Prod. 5: 211–215.Google Scholar