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Journal Article

Induction of Oestrus and Pregnancy in Autumn-Born Ewe Lambs

M. G. Keane
Irish Journal of Agricultural Research
Vol. 14, No. 1 (Apr., 1975), pp. 81-84
Stable URL: http://www.jstor.org/stable/25555757
Page Count: 4

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Topics: Lambs, Pessaries, Ova, Ovulation, Puberty, Crop production, Slaughter, Livestock farms, Fallopian tubes, Estrogens
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Induction of Oestrus and Pregnancy in Autumn-Born Ewe Lambs
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Abstract

The effect of progestagen-PMS treatment on the reproductive performance of autumn-born ewe lambs was investigated. Pessaries were retained by 25 of the 28 animals treated and 96% of those showed oestrus. A minority (28.6%) of oestrous lambs did not ovulate. All ova recovered were fertilised but only 41.7% of animals were pregnant 30 days post-mating.

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