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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: |
03/08/2023 |
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Autoria: |
THOMAS, G. B.; OLDHAM, C. M.; HOSKINSON, R. M.; SCARAMUZZI, R. J.; MARTIN, G. B. |
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Título: |
Effect of immunization against progesterone on oestrus, cycle lenght, ovulation rate, luteal regression and LH secretion in the ewe. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Australian Journal of Biology Sciency, v. 40, n. 3, p. 307-313, 1987. |
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DOI: |
https://doi.org/10.1071/BI9870307 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The effects of active immunization against progesterone on reproductive activity were studied in Merino ewes. Immunization against progesterone caused a shortening (P < 0'01) of the interval between ovulations from 17-18 days (controls) to between 6 and 10 days (immunized group); this was associated with a corresponding reduction in the interval between LH surges. The immunized ewes also had higher (P < O· 05) ovulation rates (1' 72) than controls (I. 25) and exhibited a reduced (P < 0'01) incidence of oestrus (26% v. 95%). Many immunized ewes continued to ovulate despite the persistence of corpora lutea from earlier ovulations which led to an accumulation on the ovaries of many corpora lutea of different ages. The frequency of LH pulses in ewes immunized against progesterone (1'8 ± 0·2 pulses/4 h) was significantly (P < 0'001) higher than that of control ewes (0'3 ± 0·1 pulses/4 h). This study highlights the importance of progesterone in the control of oestrus, ovulation, ovulation rate, luteal regression and the secretion of LH in the ewe. |
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Thesagro: |
Ciclo Estral; Fisiologia; Ovino; Reprodução. |
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Thesaurus Nal: |
Endocrinology; Estrus; Immunization; Luteinizing hormone; Luteolysis; Ovulation; Physiology; Progesterone; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02095naa a2200349 a 4500
001 1519686
005 2023-08-03
008 1987 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1071/BI9870307$2DOI
100 1 $aTHOMAS, G. B.
245 $aEffect of immunization against progesterone on oestrus, cycle lenght, ovulation rate, luteal regression and LH secretion in the ewe.$h[electronic resource]
260 $c1987
520 $aAbstract: The effects of active immunization against progesterone on reproductive activity were studied in Merino ewes. Immunization against progesterone caused a shortening (P < 0'01) of the interval between ovulations from 17-18 days (controls) to between 6 and 10 days (immunized group); this was associated with a corresponding reduction in the interval between LH surges. The immunized ewes also had higher (P < O· 05) ovulation rates (1' 72) than controls (I. 25) and exhibited a reduced (P < 0'01) incidence of oestrus (26% v. 95%). Many immunized ewes continued to ovulate despite the persistence of corpora lutea from earlier ovulations which led to an accumulation on the ovaries of many corpora lutea of different ages. The frequency of LH pulses in ewes immunized against progesterone (1'8 ± 0·2 pulses/4 h) was significantly (P < 0'001) higher than that of control ewes (0'3 ± 0·1 pulses/4 h). This study highlights the importance of progesterone in the control of oestrus, ovulation, ovulation rate, luteal regression and the secretion of LH in the ewe.
650 $aEndocrinology
650 $aEstrus
650 $aImmunization
650 $aLuteinizing hormone
650 $aLuteolysis
650 $aOvulation
650 $aPhysiology
650 $aProgesterone
650 $aReproduction
650 $aSheep
650 $aCiclo Estral
650 $aFisiologia
650 $aOvino
650 $aReprodução
700 1 $aOLDHAM, C. M.
700 1 $aHOSKINSON, R. M.
700 1 $aSCARAMUZZI, R. J.
700 1 $aMARTIN, G. B.
773 $tAustralian Journal of Biology Sciency$gv. 40, n. 3, p. 307-313, 1987.
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| 2. | | RIVERO, M. J.; LOPEZ-VILALOBOS, N.; EVANS, A.; BERNDT, A.; CARTMILL, A.; NEAL, A. L.; MCLAREN, A.; FARRUGGIA, A.; MIGNOLET, C.; CHADWICK, D.; MCCRACKEN, D.; BUSCH, D.; MARTIN, G. B.; FLEMING, H.; SHERIDAN, H.; GIBBONS, J.; MERBOLD, L.; EISLER, M.; LAMBE, N.; ROVIRA, P.; HARRIS, P.; MURPHY, P.; VERCOE, P. E.; WILLIAMS, P.; MACHADO, R.; TAKAHASHI, T.; PUECH, T.; BOLAND, T.; AYALA, W.; LEE, M. R. F. Key traits for ruminant livestock across diverse production systems in the context of climate change: perspectives from a global platform of research farms. Reproduction, Fertility and Development, v. 33, p. 1-19, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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| Registros recuperados : 3 | |
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