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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
16/06/2017 |
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Data da última atualização: |
16/06/2017 |
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Autoria: |
WALLACE, J. M.; McNEILLY, A. S.; BAIRD, D. T. |
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Título: |
Induction of ovulation during anoestrus in two breeds of sheep with multiple injections of LH alone or in combination with FSH. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Journal of Endocrinology, v. 111, n. 1, p. 181-190, Oct. 1986. |
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DOI: |
10.1677/joe.0.1110181 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The gonadotrophic requirements for the induction of ovulation and formation of a viable corpus luteum in two breeds of seasonally anoestrous sheep of differing fecundity was investigated. Welsh Mountain (n = 20) and Damline ewes (n = 19) were given LH or FSH either alone or in combination. Luteinizing hormone was injected i.v. at an increasing frequency for 72 h (one injection every 3 h for 24 h, one every 2 h for 24 h, and one every hour for 24 h) and FSH was injected in an identical manner for the first 36 h of treatment. Exogenous LH alone and in combination with FSH induced a preovulatory LH surge in all 19 ewes and ovulation in 18 out of 19 ewes of both breeds. However exogenous FSH alone was ineffective. The incidence of normal corpus luteum function in ewes induced to ovulate was low and not related to treatment, timing or magnitude of the LH/FSH surge. It is concluded that in both breeds studied it is the infrequency of LH pulses which limits the development of preovulatory follicles during seasonal anoestrus, that the requirement for FSH remains unknown, and that the induction of inadequate corpora lutea during seasonal anoestrus reflects either defects in hormonal priming of the preovulatory follicle and/or inappropriate luteotrophic support after ovulation. |
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Palavras-Chave: |
FSH; Induced ovulation; LH; Methods. |
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Thesaurus Nal: |
Dosage; Ewes; Intravenous injection; Seasons; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02041naa a2200265 a 4500
001 2070990
005 2017-06-16
008 1986 bl uuuu u00u1 u #d
024 7 $a10.1677/joe.0.1110181$2DOI
100 1 $aWALLACE, J. M.
245 $aInduction of ovulation during anoestrus in two breeds of sheep with multiple injections of LH alone or in combination with FSH.
260 $c1986
520 $aAbstract: The gonadotrophic requirements for the induction of ovulation and formation of a viable corpus luteum in two breeds of seasonally anoestrous sheep of differing fecundity was investigated. Welsh Mountain (n = 20) and Damline ewes (n = 19) were given LH or FSH either alone or in combination. Luteinizing hormone was injected i.v. at an increasing frequency for 72 h (one injection every 3 h for 24 h, one every 2 h for 24 h, and one every hour for 24 h) and FSH was injected in an identical manner for the first 36 h of treatment. Exogenous LH alone and in combination with FSH induced a preovulatory LH surge in all 19 ewes and ovulation in 18 out of 19 ewes of both breeds. However exogenous FSH alone was ineffective. The incidence of normal corpus luteum function in ewes induced to ovulate was low and not related to treatment, timing or magnitude of the LH/FSH surge. It is concluded that in both breeds studied it is the infrequency of LH pulses which limits the development of preovulatory follicles during seasonal anoestrus, that the requirement for FSH remains unknown, and that the induction of inadequate corpora lutea during seasonal anoestrus reflects either defects in hormonal priming of the preovulatory follicle and/or inappropriate luteotrophic support after ovulation.
650 $aDosage
650 $aEwes
650 $aIntravenous injection
650 $aSeasons
650 $aSheep
653 $aFSH
653 $aInduced ovulation
653 $aLH
653 $aMethods
700 1 $aMcNEILLY, A. S.
700 1 $aBAIRD, D. T.
773 $tJournal of Endocrinology$gv. 111, n. 1, p. 181-190, Oct. 1986.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 6 | |
| 4. |  | SOUZA, C. J. H. de; McNEILLY, A. S.; BENAVIDES, M. V.; MELO, E. O.; MORAES, J. C. F. Mutation in the protease cleavage site of GDF9 increases ovulation rate and litter size in heterozygous ewes and causes infertility in homozygous ewes. Animal Genetics, Oxford, v. 45, n. 5, p. 732-739, Oct. 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Pecuária Sul; Embrapa Pesca e Aquicultura; Embrapa Recursos Genéticos e Biotecnologia. |
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| 5. | | SOUZA, C. J. H. de; MCNEILLY, A. S.; BENAVIDES, M. V.; MELO, E. de O.; MORAES, J. C. F. Polimorfismo no gene GDF9 determinante de maior taxa de ovulação e prolificidade em ovinos. In: REUNIÓN DE LA ASOCIACIÓN LATINOAMERICANA DE PRODUCCIÓN ANIMAL, 22., 2011, Montevideo, Uruguay. Memorias... Montevideo: Asociación Uruguaya de Producción Animal, 2011. Poster.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 6. | | SOUZA, C. J. H. de; MCNEILLY, A. S.; BENAVIDES, M. V.; MELO, E. de O.; MORAES, J. C. F. Polimorfismo no gene GDF9 determinante de maior taxa de ovulação e prolificidade em ovinos. In: REUNIÓN DE LA ASOCIACIÓN LATINOAMERICANA DE PRODUCCIÓN ANIMAL, 22., 2011, Montevideo, Uruguay. Memorias... Montevideo: Asociación Uruguaya de Producción Animal, 2011. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| Registros recuperados : 6 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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