| The effect of the gonadotrophin-releasing hormone analog, buserelin, administered in diestrus on pregnancy rates and pregnancy failure in mares. | |
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MedLine Citation:
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PMID: 16727973 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Two trials involving 578 mares were performed to investigate the effect of a single intramuscular treatment of 40 microg buserelin, an analog of gonadotrophin releasing hormone, on pregnancy rate in mares. All mares were bred by natural mating and were allocated into pairs One mare in each pair was injected with buserelin either on Day 10 or 11 (Trial 1) or on Days 8 to 10 (Trial 2) after ovulation. Pregnancy status of mares was determined by transrectal ultrasonographic examination on Day 14 or 15 after the day of ovulation and was repeated between Days 28 and 30 of pregnancy. In Trial 1, buserelin treatment increased the pregnancy rate at Days 14 and 15 (72.5 vs 66.6%, P < 0.01). At the second pregnancy examination, pregnancy losses were lower in the treated group of mares (4.1 vs 7.4%; P < 0.05). In Trial 2, buserelin also improved the pregnancy rate (57.2 vs 53 5%; P < 0.05) at Days 14 and 15 Pregnancy losses between the first and second examinations were lower in the treated group of mares (6.5 vs 12.0%; P < 0.05). Buserelin increased pregnancy rates after breeding at the first estrus in both trials. In addition, buserelin treatment increased the pregnancy maintenance rate at Days 28 to 30. |
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Authors:
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J F Pycock; J R Newcombe |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Theriogenology Volume: 46 ISSN: 0093-691X ISO Abbreviation: Theriogenology Publication Date: 1996 Oct |
Date Detail:
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Created Date: 2006-05-26 Completed Date: 2007-07-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0421510 Medline TA: Theriogenology Country: United States |
Other Details:
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Languages: eng Pagination: 1097-101 Citation Subset: - |
Affiliation:
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Howe Farm Cottage, Old Malton, North Yorkshire YO17 ORG, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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