| Field trial of a planned breeding regimen for dairy cows, using gonadotrophin-releasing hormone and prostagladin F2alpha. | |
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MedLine Citation:
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PMID: 10609573 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A planned breeding regimen, using gondadotrophin-releasing hormone (GnRH), prostaglandin F2alpha, and a second dose of GnRH, followed by a fixed time insemination, was evaluated in comparison with a negative control on eight commercial dairy farms in the south of England. Fertility data were collected from the 220 cows in the planned breeding group and from 220 matched control cows inseminated at observed oestrus. The planned regimen induced visible oestrus in the vast majority of the cows, and serving the cows at this oestrus reduced the calving to conception interval by 15 days, resulting in 12 per cent more cows being pregnant by 125 days after calving, and 6 per cent more by 150 days. The results from the individual farms suggested that more benefit may be derived from using the regimen in herds with only average fertility indices. There was also evidence to suggest that the second GnRH injection was important, even in cows that came on heat and were served before the fixed time insemination. |
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Authors:
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I Mawhinney; H Biggadike; B Drew |
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Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article |
Journal Detail:
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Title: The Veterinary record Volume: 145 ISSN: 0042-4900 ISO Abbreviation: Vet. Rec. Publication Date: 1999 Nov |
Date Detail:
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Created Date: 2000-01-19 Completed Date: 2000-01-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0031164 Medline TA: Vet Rec Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 551-4 Citation Subset: IM |
Affiliation:
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Intervet UK Ltd, Science Park, Cambridge. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Domestic Breeding* / methods Cattle / physiology* Dinoprost / administration & dosage* Drug Administration Schedule Female Fertility Fertility Agents, Female / administration & dosage* Gonadotropin-Releasing Hormone / administration & dosage* Pregnancy Pregnancy Rate Prostaglandins F, Synthetic / administration & dosage* Random Allocation |
| Chemical | |
Reg. No./Substance:
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0/Fertility Agents, Female; 0/Prostaglandins F, Synthetic; 33515-09-2/Gonadotropin-Releasing Hormone; 551-11-1/Dinoprost; 73523-00-9/luprostenol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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