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Registro Completo |
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
31/03/2017 |
Data da última atualização: |
20/06/2017 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
ALVES, E. R. de A. |
Afiliação: |
ELISEU ROBERTO DE ANDRADE ALVES, DE/PR. |
Título: |
Desenvolvimento do projeto Gado de leite: escritório de Pará de Minas. |
Ano de publicação: |
1985 |
Fonte/Imprenta: |
In: SOUZA, L. G.; JANUARIO, M. da C. Coletânea de trabalhos publicados: Eliseu Roberto de Andrade Alves e outros. Brasília, DF: Embrapa, 1985. v.1 |
Páginas: |
p. 123-168 |
Idioma: |
Português |
Palavras-Chave: |
Pará de Minas. |
Thesagro: |
Gado leiteiro. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/158480/1/Desenvolvimento-do-projeto-Para-de-Minas.pdf
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Marc: |
LEADER 00544naa a2200145 a 4500 001 2067977 005 2017-06-20 008 1985 bl uuuu u00u1 u #d 100 1 $aALVES, E. R. de A. 245 $aDesenvolvimento do projeto Gado de leite$bescritório de Pará de Minas.$h[electronic resource] 260 $c1985 300 $ap. 123-168 650 $aGado leiteiro 653 $aPará de Minas 773 $tIn: SOUZA, L. G.; JANUARIO, M. da C. Coletânea de trabalhos publicados: Eliseu Roberto de Andrade Alves e outros. Brasília, DF: Embrapa, 1985.$gv.1
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Embrapa Unidades Centrais (AI-SEDE) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
04/01/2010 |
Data da última atualização: |
14/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MACHADO, R.; BERGAMASCHI, M. A. C. M.; BARBOSA, R. T.; OLIVEIRA, C. A. de; BINELLI, M. |
Afiliação: |
RUI MACHADO, CPPSE; MARCO AURELIO C MEIRA BERGAMASCHI, CPPSE; ROGERIO TAVEIRA BARBOSA, CPPSE; C. A. DE OLIVEIRA, FMVZ-USP - SÃO PAULO; M. BINELLI, FMVZ - USP - SÃO PAULO. |
Título: |
Ovarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Theriogenology, v. 69, n. 7, p. 798-804, apr. 2008. |
DOI: |
10.1016/j.theriogenology.2007.10.025 |
Idioma: |
Inglês |
Conteúdo: |
Maternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. MenosMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estr... Mostrar Tudo |
Palavras-Chave: |
Antiluteolytic strategies; Ovary. |
Thesagro: |
Estradiol. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02251naa a2200217 a 4500 001 1579307 005 2023-03-14 008 2008 bl uuuu u00u1 u #d 024 7 $a10.1016/j.theriogenology.2007.10.025$2DOI 100 1 $aMACHADO, R. 245 $aOvarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments.$h[electronic resource] 260 $c2008 520 $aMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. 650 $aEstradiol 653 $aAntiluteolytic strategies 653 $aOvary 700 1 $aBERGAMASCHI, M. A. C. M. 700 1 $aBARBOSA, R. T. 700 1 $aOLIVEIRA, C. A. de 700 1 $aBINELLI, M. 773 $tTheriogenology$gv. 69, n. 7, p. 798-804, apr. 2008.
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