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The introduction of rams and overfeeding for the induction of oestrus during seasonal anoestrus in Aragon ewes



The introduction of rams and overfeeding for the induction of oestrus during seasonal anoestrus in Aragon ewes



9th International Congress on Animal Reproduction and Artificial Insemination, 16th-20th June 1980 III Symposia free communications: 361



The abrupt introduction of a ram into a flock of ewes after a period of overfeeding and isolation from rams resulted in all ewes ovulating, 40% showing oestrus; 5 and 80% of ewes lambed following service at the 1st and 2nd ovulations resp. When rams were introduced at the end of a period of progesterone treatment, 89.5% of ewes showed oestrus the next day, and 79% of these conceived.

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