THE STIMULATION OF FERTILE OESTRUS IN ANOESTROUS ROMNEY EWES. I

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Authors:
E. M. ROBERTS
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and
D. G. EDGAR
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DOI:
https://doi.org/10.1530/jrf.0.0120561
Volume/Issue:
Volume 12: Issue 3
Page Range:
561–564
Article Type:
Research Article
Online Publication Date:
Dec 1966
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Summary.

Anoestrous Romney ewes were treated for 10 or 13 days with intra-vaginal sponges containing 400 mg of progesterone or 40 mg of 6-methyl-17-acetoxyprogesterone. Pregnant mare's serum gonadotrophin (pmsg) was injected subcutaneously on the 10th and 26th, or 13th and 29th days.

A more highly synchronized pattern of oestrus occurred in ewes which retained sponges for 13 days than at 10 days. The number of ewes lambing and the number of lambs born as a percentage of ewes treated was as high as in later-lambing untreated ewes.

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Sept 2018 onwards Past Year Past 30 Days
Full Text Views 137 53 16
PDF Downloads 54 16 1

 

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Print ISSN:
1470-1626
Online ISSN:
1741-7899