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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
31/03/2023 |
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Autoria: |
HENDERSON, K. M.; ELLEN, R. L.; SAVAGE, L. C.; BALL, K.; McNATTY, K. P. |
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Título: |
Effect on ovulation rate of increasing or decreasing ovarian exposure to follicle stimulating hormone during the preovulatory period in ewes. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Proceedings of the New Zealand Society of Animal Production, v. 46, p. 157-159, 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Ovine FSH was administered hourly to ewes for 48 h from the initiation of luteolysis. The mean ovulation rates of ewes receiving 2.5 µg FSH/h (2.1 ± 0.2 ovulations/ewe, mean ± s.e.m., n=8) and 5.0 µg FSH/h (6.2 ± 2.0 ovulations/ewe, n=6) were significantly higher (P< 0.01) than that of control ewes (1.3 ± 0.1 ovulations/ewe, n=16). Mean plasma concentrations of FSH were also raised above normal by these doses of FSH. Plasma concentrations of FSH were reduced below normal by twice daily administration of steroid-free bovine follicular fluid (bFF) for 48 h from the initiation of luteolysis. As a consequence follicles failed to achieve ovulatory maturity. Large follicles (?5mm diameter) from ewes treated with bFF for 48 h had reduced concentrations of oestradiol-17b in follicular fluid, fewer granulosa cells, and the cells had a reduced ability to metabolise testosterone to oestradiol-17b and to produce cyclic AMP when challenged with FSH or LH. |
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Palavras-Chave: |
Follicle stimulating hormone; FSH; Ovulation rate. |
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Thesagro: |
Fisiologia; Hormônio; Ovino; Ovulação; Reprodução. |
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Thesaurus Nal: |
Follicular fluid; Gonadotropins; Granulosa cells; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01938naa a2200325 a 4500
001 1519707
005 2023-03-31
008 1986 bl uuuu u00u1 u #d
100 1 $aHENDERSON, K. M.
245 $aEffect on ovulation rate of increasing or decreasing ovarian exposure to follicle stimulating hormone during the preovulatory period in ewes.$h[electronic resource]
260 $c1986
520 $aAbstract: Ovine FSH was administered hourly to ewes for 48 h from the initiation of luteolysis. The mean ovulation rates of ewes receiving 2.5 µg FSH/h (2.1 ± 0.2 ovulations/ewe, mean ± s.e.m., n=8) and 5.0 µg FSH/h (6.2 ± 2.0 ovulations/ewe, n=6) were significantly higher (P< 0.01) than that of control ewes (1.3 ± 0.1 ovulations/ewe, n=16). Mean plasma concentrations of FSH were also raised above normal by these doses of FSH. Plasma concentrations of FSH were reduced below normal by twice daily administration of steroid-free bovine follicular fluid (bFF) for 48 h from the initiation of luteolysis. As a consequence follicles failed to achieve ovulatory maturity. Large follicles (?5mm diameter) from ewes treated with bFF for 48 h had reduced concentrations of oestradiol-17b in follicular fluid, fewer granulosa cells, and the cells had a reduced ability to metabolise testosterone to oestradiol-17b and to produce cyclic AMP when challenged with FSH or LH.
650 $aFollicular fluid
650 $aGonadotropins
650 $aGranulosa cells
650 $aReproduction
650 $aSheep
650 $aFisiologia
650 $aHormônio
650 $aOvino
650 $aOvulação
650 $aReprodução
653 $aFollicle stimulating hormone
653 $aFSH
653 $aOvulation rate
700 1 $aELLEN, R. L.
700 1 $aSAVAGE, L. C.
700 1 $aBALL, K.
700 1 $aMcNATTY, K. P.
773 $tProceedings of the New Zealand Society of Animal Production$gv. 46, p. 157-159, 1986.
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Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | SCARIOT, A. O.; FREITAS, S. R. de; MARIANO NETO, E.; NASCIMENTO, M. T.; OLIVEIRA, L. C. de; SANAIOTTI, T. M.; SEVILHA, A. C.; VILLELA, D. M. Vegetação e flora. In: RAMBALDI, D. M.; OLIVEIRA, D. A. (org.). Fragmentação de ecossistemas: causas, efeitos sobre a biodiversidade e recomendações de políticas públicas. Brasília, DF: Ministério do Meio Ambiente, 2003. p. 103-123.| Tipo: Capítulo em Livro Técnico-Científico |
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