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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: |
09/06/2025 |
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Autoria: |
THORBURN, G. D.; SCNEIDER, W. |
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Título: |
The progesterone concentration in the plasma of the goat during the oestrus cycle and pregnancy. |
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Ano de publicação: |
1972 |
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Fonte/Imprenta: |
Journal Endocrinology, v. 52, n. 1, p. 23-36, Jan. 1972. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Progesterone concentrations in the peripheral plasma of goats were measured by a protein-binding assay. The mean concentration was extremely low on the day of oestrus (0·2 ng/ml) and was not significantly different from that found in anoestrous or ovariectomized animals. The concentration increased to a maximum of 4 ng/ml on about day 10 of the 21-day cycle, and decreased rapidly during the last 3 days of the cycle. Plasma progesterone concentration during early pregnancy (2·5?3·5 ng/ml) was similar to the luteal phase value and remained steady from day 8 to day 60. Between days 60 and 70 there was a secondary increase in progesterone concentration which was maintained at this increased level (4·5?5·5 ng/ml) until just before parturition. In twin-bearing animals, the secondary increase was greater. Progesterone concentration decreased rapidly during the 1?2 days preceding parturition, but the concentration was still quite high on the day of parturition (1·25 ng/ml). The progesterone concentration in peripheral plasma was markedly increased during anaesthesia and the operation. After bilateral ovariectomy of the pregnant goat, peripheral progesterone concentration fell rapidly from 9 to 2·5 ng/ml during the first ½ h and then more slowly during the next 5?6 h. The animals aborted 36?48 h later. A consistent positive arterio?venous difference for progesterone was observed across the pregnant uterus in two unanaesthetized goats. These results indicate that the ovary is the main site of progesterone production in the pregnant goat and that production by the placenta is small and unlikely to influence the level of this hormone in the maternal circulation. MenosAbstract: Progesterone concentrations in the peripheral plasma of goats were measured by a protein-binding assay. The mean concentration was extremely low on the day of oestrus (0·2 ng/ml) and was not significantly different from that found in anoestrous or ovariectomized animals. The concentration increased to a maximum of 4 ng/ml on about day 10 of the 21-day cycle, and decreased rapidly during the last 3 days of the cycle. Plasma progesterone concentration during early pregnancy (2·5?3·5 ng/ml) was similar to the luteal phase value and remained steady from day 8 to day 60. Between days 60 and 70 there was a secondary increase in progesterone concentration which was maintained at this increased level (4·5?5·5 ng/ml) until just before parturition. In twin-bearing animals, the secondary increase was greater. Progesterone concentration decreased rapidly during the 1?2 days preceding parturition, but the concentration was still quite high on the day of parturition (1·25 ng/ml). The progesterone concentration in peripheral plasma was markedly increased during anaesthesia and the operation. After bilateral ovariectomy of the pregnant goat, peripheral progesterone concentration fell rapidly from 9 to 2·5 ng/ml during the first ½ h and then more slowly during the next 5?6 h. The animals aborted 36?48 h later. A consistent positive arterio?venous difference for progesterone was observed across the pregnant uterus in two unanaesthetized goats. These results indicate that the ovary i... Mostrar Tudo |
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Thesagro: |
Cabra; Caprino; Ciclo Estral; Endocrinologia; Hormônio Animal; Prenhez; Progesterona; Reprodução. |
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Thesaurus Nal: |
Abortion (animals); Goats; Pregnancy; Progesterone; Protein binding; Thin layer chromatography. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02533naa a2200301 a 4500
001 1522178
005 2025-06-09
008 1972 bl uuuu u00u1 u #d
100 1 $aTHORBURN, G. D.
245 $aThe progesterone concentration in the plasma of the goat during the oestrus cycle and pregnancy.$h[electronic resource]
260 $c1972
520 $aAbstract: Progesterone concentrations in the peripheral plasma of goats were measured by a protein-binding assay. The mean concentration was extremely low on the day of oestrus (0·2 ng/ml) and was not significantly different from that found in anoestrous or ovariectomized animals. The concentration increased to a maximum of 4 ng/ml on about day 10 of the 21-day cycle, and decreased rapidly during the last 3 days of the cycle. Plasma progesterone concentration during early pregnancy (2·5?3·5 ng/ml) was similar to the luteal phase value and remained steady from day 8 to day 60. Between days 60 and 70 there was a secondary increase in progesterone concentration which was maintained at this increased level (4·5?5·5 ng/ml) until just before parturition. In twin-bearing animals, the secondary increase was greater. Progesterone concentration decreased rapidly during the 1?2 days preceding parturition, but the concentration was still quite high on the day of parturition (1·25 ng/ml). The progesterone concentration in peripheral plasma was markedly increased during anaesthesia and the operation. After bilateral ovariectomy of the pregnant goat, peripheral progesterone concentration fell rapidly from 9 to 2·5 ng/ml during the first ½ h and then more slowly during the next 5?6 h. The animals aborted 36?48 h later. A consistent positive arterio?venous difference for progesterone was observed across the pregnant uterus in two unanaesthetized goats. These results indicate that the ovary is the main site of progesterone production in the pregnant goat and that production by the placenta is small and unlikely to influence the level of this hormone in the maternal circulation.
650 $aAbortion (animals)
650 $aGoats
650 $aPregnancy
650 $aProgesterone
650 $aProtein binding
650 $aThin layer chromatography
650 $aCabra
650 $aCaprino
650 $aCiclo Estral
650 $aEndocrinologia
650 $aHormônio Animal
650 $aPrenhez
650 $aProgesterona
650 $aReprodução
700 1 $aSCNEIDER, W.
773 $tJournal Endocrinology$gv. 52, n. 1, p. 23-36, Jan. 1972.
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| Registros recuperados : 132 | |
| 2. |  | RODRIGUES, T. E.; SANTOS, P. L. dos; VALENTE, M. A. Levantamento semidetalhado dos solos e avaliação da aptidão agrícola das terras do Campo Experimental do Caldeirão do CPAA/EMBRAPA - Iranduba - Amazonas. Belém, PA: EMBRAPA-SNLCS, Coordenadoria Regional Norte, 1991. 74 p. (EMBRAPA-SNLCS. Boletim de pesquisa). Identificação e mapeamento: Tarcísio Ewerton Rodrigues, Paulo Lacerda dos Santos. Caracterização química: Wilson Sant'Anna de Araújo, Marie Elizabeth C. C. de Magalhães Melo, Maria Amélia de Moraes Duriez, Ruth Andrade Leal Johas,...| Biblioteca(s): Embrapa Solos. |
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| 6. | | WATRIN, O. dos S.; SANTOS, D. B. O.; VALENTE, M. A. Base de dados geográficos como subsídio à gestão territorial na fazenda experimental da Embrapa Amazônia Oriental, Belém, PA. Belém, PA: Embrapa Amazônia Oriental, 2011. 34 p. (Embrapa Amazônia Oriental. Boletim de pesquisa e desenvolvimento, 77). Anexo 4 mapas: Solos da Fazenda Experimental da Embrapa Amazônia Oriental, Belém, PA; Uso atual das terras da Fazenda Experimental da Embrapa Amazônia Oriental, Belém, PA; Restrição legal ao uso da terra da Fazenda Experimental da Embrapa...| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 9. | | SILVA, J. M. L. da; RODRIGUES, T. E.; VALENTE, M. A.; COSTA FILHA, C. L. Avaliação da aptidão agrícola das terras do Município de Acrelândia, Estado do Acre. Belém, PA: Embrapa Amazônia Oriental, 2002. 26 p. (Embrapa Amazônia Oriental. Documentos, 146). Anexo 5 mapas: Levantamento de reconhecimento de alta intensidade dos solos do Município de Acrelândia, Estado do Acre; Mapa de aptidão agrícola das terras do Município de Acrelândia, Estado do Acre; Mapa de potencialidade à mecanização...| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 15. | | RODRIGUES, T. E.; SILVA, J. M. L. da; OLIVEIRA JUNIOR, R. C. de; VALENTE, M. A. Algumas características de solos de mangue do litoral paraense. In: WORKSHOP ECOLAB, 3., 1995, Belém, PA. Livro de resumos expandidos. Belém, PA: UFPA: MPEG: SUDAM, 1995. p. 122. Programa de Estudos de Ecossistemas Costeiros Tropicais. Organização: Maria Emília da cruz Sales.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | VALENTE, M. A.; SILVA, L. F. R. da; OLIVEIRA JUNIOR, R. C. de. Caracterização do uso e cobertura do solo da folha de Marapanim, Estado do Pará. In: WORKSHOP ECOLAB, 3., 1995, Belém, PA. Livro de resumos expandidos. Belém, PA: UFPA: MPEG: SUDAM, 1995. Programa de Estudos de Ecossistemas Costeiros Tropicais. Organização: Maria Emília da cruz Sales. p.124-125. Programa de Estudos de Ecossistemas Costeiros Tropicais. Organização: Maria Emília da cruz Sales.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 20. | | SANTOS, P. L. dos; MARTINS, J. S.; VALENTE, M. A.; OLIVEIRA JUNIOR, R. C. de. Capacidade de troca de cations da fração argila em Latossolo amarelo de textura média e muito argilosa. In: CONGRESSO LATINO AMERICANO DE CIÊNCIA DO SOLO, 13.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 1.; SIMPÓSIO BRASILEIRO SOBRE MICROBIOLOGIA DO SOLO, 4.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 6.; REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 11., 1996, Aguas de Lindoia. Solo suelo 96. Aguas de Lindoia: SBCS/SLCS, 1996. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Solos. |
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| Registros recuperados : 132 | |
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