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The regulation of oestrous cycles in groups of post-pubertal female pigs using allyl-trenbolone

Published online by Cambridge University Press:  02 September 2010

M. A. Varley
M. A. Varley
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

Sixty Landrace × Large White gilts were allocated at random to one of three treatments. Treatment A gilts were fed 16 mg allyl-trenbolone once a day for 18 days. Treatment B gilts were fed 20 mg allyl-trenbolone per day for 18 days. Treatment C gilts were controls. The gilts were allocated to treatment at 111·3 ± 1·91 kg live weight, moved to a pen with individual feeders and put into groups of four gilts to a pen with a sexually mature boar in the adjacent pen. Treatment A and B gilts were tested for heat with a boar for 20 min each day beginning on the day after the last allyl-trenbolone feed. Treatment C gilts were tested with a boar in the same way after allocation. The time from the last allyl-trenbolone feed to oestrus for treatments A and B was 7·05 ± 0·44 and 8·4 ± 0·49 days. The time from the beginning of heat detection to oestrus for group C gilts was 22·4 ± 4·5 days. At oestrus, all gilts were mated twice on successive days with a fertile boar. The mean litter size at farrowing for treatment A was 9·1 ± 0·62; B, 11·2 ± 0·75 and C, 9·3 ± 0·65 piglets born alive (P < 0·05). It is concluded that giving 20 mg of allyl-trenbolone for 18 days to groups of peripubertal gilts is a very effective means of controlling oestrus and ovulation.

Type
Research Article
Information
Animal Production , Volume 36 , Issue 2 , April 1983 , pp. 211 - 215
Copyright
Copyright © British Society of Animal Science 1983

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References

REFERENCES

Hughes, P. E. 1982. Factors affecing the natural attainment of puberty in the gilt. In Control of Pig Reproduction, (ed. Cole, D. J. A., and Foxcroft, G. R.), pp. 117–138. Butterworth. London.CrossRefGoogle Scholar
Hughes, P. E. and Varley, M. A. 1980. Reproduction in the Pig. Butterworth, London.Google Scholar
King, G. J. 1969. Deformaties in piglets following administration of methallibure during specific stages of gestation. J. Reprod. Fert. 20: 551–553.CrossRefGoogle Scholar
Kraeung, R. R., Dziuk, P. J., Pursel, V. G., Rampacek, G. B. and Webel, S. K. 1979. Syncronisation of oestrus and ovulation in swine with an orally active progestagen (RU—2267). J. Anim. Sci. 49: Suppl. 1, p. 319 (Abstr.).Google Scholar
Mauleon, P., Martinat-Botte, J. P. and Scheid, J. P. 1979. Oestrus control in multiparous gilts with a progestagen treatment (RU–2267). J. Anim. Sci. 49: Suppl. 1, p. 328 (Abstr.).Google Scholar
Polge, E. J. C. 1972. Synchronization of oestrus in pigs. In Pig Production (ed. Cole, D. J. A.), pp. 315–327. Butterworth, London.Google Scholar