MSD Manual

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Professional Version

Management of Reproduction: Sheep

By

John WA Larsen

, BVSc, PhD, Faculty of Veterinary and Agricultural Sciences, University of Melbourne

Last full review/revision May 2021 | Content last modified Jul 2021

Several key points are the basis of a sound flock reproduction health management program. First, sheep are short-day polyestrus breeders (ie, estrus occurs in response to shortening day length). Second, ovulatory season tends to be in fall and winter; anovulatory season during late winter, spring and early summer; the transition season occurs in the late summer months. Finally, there is considerable breed-to-breed variation in prolificacy and length of the ovulatory season.

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