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A new approach to controlled breeding in sheep using the 'ram effect'

A new approach to controlled breeding in sheep using the 'ram effect'

Proceedings of the Australian Society of Animal Production 14: 519-522

Ewes which are induced to ovulate by the introduction of rams (the ram effect) often have short cycles caused by corpora lutea with a short lifespan. In 2 experiments, the use of progestogens to increase the lifespan of such corpora lutea, and to ensure synchrony at the next ovulation, was studied. Treatment with intravaginal progestogen sponges before the introduction of rams induced 34 of 35 ewes to ovulate and display oestrus.

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Accession: 001038694

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