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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Gado de Leite. |
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Data corrente: |
21/05/2010 |
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Data da última atualização: |
15/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VIANA, J. H. M.; PALHÃO, M. P.; SIQUEIRA, L. G. B.; FONSECA, J. F. da; CAMARGO, L. S. de A. |
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Afiliação: |
JOAO HENRIQUE MOREIRA VIANA, CNPGL; M. P. PALHÃO, UFV; LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL; JEFERSON FERREIRA DA FONSECA, CNPC; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL. |
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Título: |
Ovarian follicular dynamics, follicle deviation, and oocyte yield in Gyr breed (Bos indicus) cows undergoing repeated ovum pick-up. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Theriogenology, v. 73, n. 7, p. 966-972, 2010. |
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DOI: |
https://doi.org/10.1016/j.theriogenology.2009.11.025 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations altered ovarian follicular dynamics, perhaps by increasing follicular growth rate; (b) follicular dominance could be established in cows undergoing twice-a-week OPU; and (c) the presence of a dominant follicle during short inter-OPU intervals may not affect COC quality, except when a codominant follicle was present. # 2010 Elsevier Inc. All rights reserved. MenosThe objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations ... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Cumulus cells; Cytology; Dinâmica folicular; Folículo; Follicle ablation; OPU; Ovarian follicle; Ovarian follicular development; Suction; Zebu cattle. |
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Thesagro: |
Ciclo estral; Endocrinologia; Gado; Reprodução animal. |
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Thesaurus Nal: |
Blood cell counts; Cattle; Oocytes; Physiology; Progesterone; Reproduction; Ultrasonography. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03144naa a2200445 a 4500
001 1883063
005 2024-02-15
008 2010 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.theriogenology.2009.11.025$2DOI
100 1 $aVIANA, J. H. M.
245 $aOvarian follicular dynamics, follicle deviation, and oocyte yield in Gyr breed (Bos indicus) cows undergoing repeated ovum pick-up.$h[electronic resource]
260 $c2010
520 $aThe objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations altered ovarian follicular dynamics, perhaps by increasing follicular growth rate; (b) follicular dominance could be established in cows undergoing twice-a-week OPU; and (c) the presence of a dominant follicle during short inter-OPU intervals may not affect COC quality, except when a codominant follicle was present. # 2010 Elsevier Inc. All rights reserved.
650 $aBlood cell counts
650 $aCattle
650 $aOocytes
650 $aPhysiology
650 $aProgesterone
650 $aReproduction
650 $aUltrasonography
650 $aCiclo estral
650 $aEndocrinologia
650 $aGado
650 $aReprodução animal
653 $aBrasil
653 $aCumulus cells
653 $aCytology
653 $aDinâmica folicular
653 $aFolículo
653 $aFollicle ablation
653 $aOPU
653 $aOvarian follicle
653 $aOvarian follicular development
653 $aSuction
653 $aZebu cattle
700 1 $aPALHÃO, M. P.
700 1 $aSIQUEIRA, L. G. B.
700 1 $aFONSECA, J. F. da
700 1 $aCAMARGO, L. S. de A.
773 $tTheriogenology$gv. 73, n. 7, p. 966-972, 2010.
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Embrapa Gado de Leite (CNPGL) |
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| 1. |  | HACKET-PAIN, A.; FOEST, J. J.; PEARSE, I. S.; LAMONTAGNE, J. M.; KOENIG, W. D.; VACCHIANO, G.; BOGDZIEWICZ, M.; CAIGNARD, T.; CELEBIAS, P.; VAN DORMOLEN, J.; FERNANDEZ-MARTINEZ, M.; MORIS, J. V.; PALAGHIANU, C.; PESENDORFER, M.; SATAKE, A.; SCHERMER, E.; TANENTZAP, A. J.; THOMAS, P. A.; VECCHIO, D.; WION, A. P.; WOHLGEMUTH, T.; XUE, T. T.; ABERNETHY, K.; ACUNA, M. C. A.; BARRERA, M. D.; BARTON, J. H.; BOUTIN, S.; BUSH, E. R.; CALDERON, S. D.; CAREVIC, F. S.; CASTILHO, C. V. de; CELLINI, J. M.; CHAPMAN, C. A.; CHAPMAN, H.; CHIANUCCI, F.; COSTA, P. da; CROISE, L.; CUTINI, A.; DANTZER, B.; DEROSE, R. J.; DIKANGADISSI, J. T.; DIMOTO, E.; FONSECA, F. L. da; GALLO, L.; GRATZER, G.; GREENE, D. F.; HADAD, M. A.; HERRERA, A. H.; JEFFERY, K. J.; JOHNSTONE, J. F.; KALBITZER, U.; KANTOROWICZ, W.; KLIMAS, C. A.; LAGEARD, J. G. A.; LANE, J.; LAPIN, K.; LEDWON, M.; LEEPER, A. C.; LENCINAS, M. V.; LIRA-GUEDES, A. C.; LORDON, M. C.; MARCHELLI, P.; MARINO, S.; VAN MARLE, H. S.; MCADAM, A. G.; MOMONT, L. R. W.; NICOLAS, M.; WADT, L. H. de O.; PANAHI, P.; PASTUR, G. M.; PATTERSON, T.; PERI, P. L.; PIECHNIK, L.; POURHASHEMI, M.; QUEZADA, C. E.; ROIG, F. A.; ROJAS, K. P.; ROSAS, Y. M.; SCHUELER, S.; SEGET, B.; SOLER, R.; STEELE, M. A.; TORO-MANRIQUEZ, M.; TUTIN, C. E. G.; UKIZINTAMBARA, T.; WHITE, L.; YADOK, B.; WILLIS, J. L.; ZOLLES, A.; ZYWIEC, M.; ASCOLI, D. MASTREE+: Time-series of plant reproductive effort from six continents. Global Change Biology, v. 28, n. 9, p. 3066-3082, 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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