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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
18/02/2014 |
Data da última atualização: |
05/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VIANA, J. H. M.; DOREA, M. D.; SIQUEIRA, L. G. B.; ARASHIRO, E. K. N.; CAMARGO, L. S. de A.; FERNANDES, C. A. C.; PALHAO, M. P. |
Afiliação: |
JOAO HENRIQUE MOREIRA VIANA, CNPGL; M. D. DOREA, UFES; LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL; E. K. N. ARASHIRO, UFMG; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; C. A. C. FERNANDES, UJRV, Alfenas MG; M. P. PALHAO, UJRV, Alfenas, MG. |
Título: |
Occurrence and characteristics of residual follicles formed after transvaginal ultrasound-guided follicle aspiration in cattle. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Theriogenology, v. 79, n. 2, p. 267-273, 2013. |
DOI: |
https://doi.org/10.1016/j.theriogenology.2012.08.015 |
Idioma: |
Inglês |
Conteúdo: |
Ultrasound-guided transvaginal follicle aspiration is used to recover cumulus-oocyte complexes (for IVF) and to synchronize follicular wave emergence (ablation of dominant follicle). Although aspirated follicles are generally supposed to undergo immediate atresia, there are indications that they may remain active. The objective was to evaluate the occurrence and characteristics of residual follicles (RF) after transvaginal follicle aspiration in cattle. Ovarian follicular wave emergence was synchronized in Holstein cows (N = 13) in the presence (groups 1 and 3) or absence (groups 2 and 4) of norgestomet implants. The largest follicle was aspirated at a diameter of 8 mm (groups 1 and 2) or 12 mm (groups 3 and 4). Ovarian follicles were visualized (transrectal ultrasonography) every 12 h after wave emergence. Follicular fluid samples were collected from the largest follicle and from the ensuing RF and concentrations of estradiol and progesterone were determined. After aspiration, 73.2% (52/71) of the follicles refilled with fluid, and a new antrum was detected 12 to 24 h later. Norgestomet did not affect (P > 0.05) RF occurrence or diameter, but in RF from group 4, concentrations of estradiol decreased (-530.7 ± 133.9 ng/mL; P < 0.01) whereas progesterone increased (+429.6 ± 171.7 ng/mL; P < 0.05) relative to preaspiration. In RF, there were three steroidogenesis patterns: (1) high estradiol concentration and high estradiol:progesterone ratio (estradiol-active RF); (2) low estradiol, but high progesterone concentrations (luteinized RF); and (3) low estradiol and low progesterone concentrations (inactive RF). Estradiol-active RF were more likely (P < 0.05) from follicles with high estradiol concentrations (regardless of diameter). In conclusion, fluid-filled structures (RF) with variable steroid production patterns are frequently formed after ultrasound-guided follicle aspiration. The occurrence and features of these RF depended on the diameter and status of these follicles before aspiration. MenosUltrasound-guided transvaginal follicle aspiration is used to recover cumulus-oocyte complexes (for IVF) and to synchronize follicular wave emergence (ablation of dominant follicle). Although aspirated follicles are generally supposed to undergo immediate atresia, there are indications that they may remain active. The objective was to evaluate the occurrence and characteristics of residual follicles (RF) after transvaginal follicle aspiration in cattle. Ovarian follicular wave emergence was synchronized in Holstein cows (N = 13) in the presence (groups 1 and 3) or absence (groups 2 and 4) of norgestomet implants. The largest follicle was aspirated at a diameter of 8 mm (groups 1 and 2) or 12 mm (groups 3 and 4). Ovarian follicles were visualized (transrectal ultrasonography) every 12 h after wave emergence. Follicular fluid samples were collected from the largest follicle and from the ensuing RF and concentrations of estradiol and progesterone were determined. After aspiration, 73.2% (52/71) of the follicles refilled with fluid, and a new antrum was detected 12 to 24 h later. Norgestomet did not affect (P > 0.05) RF occurrence or diameter, but in RF from group 4, concentrations of estradiol decreased (-530.7 ± 133.9 ng/mL; P < 0.01) whereas progesterone increased (+429.6 ± 171.7 ng/mL; P < 0.05) relative to preaspiration. In RF, there were three steroidogenesis patterns: (1) high estradiol concentration and high estradiol:progesterone ratio (estradiol-active RF); (2) low est... Mostrar Tudo |
Palavras-Chave: |
Bovine; Follicle ablation; OPU; Ovarian follicular atresia; Ovary. |
Thesaurus Nal: |
steroidogenesis. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02906naa a2200277 a 4500 001 1980354 005 2024-02-05 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.theriogenology.2012.08.015$2DOI 100 1 $aVIANA, J. H. M. 245 $aOccurrence and characteristics of residual follicles formed after transvaginal ultrasound-guided follicle aspiration in cattle.$h[electronic resource] 260 $c2013 520 $aUltrasound-guided transvaginal follicle aspiration is used to recover cumulus-oocyte complexes (for IVF) and to synchronize follicular wave emergence (ablation of dominant follicle). Although aspirated follicles are generally supposed to undergo immediate atresia, there are indications that they may remain active. The objective was to evaluate the occurrence and characteristics of residual follicles (RF) after transvaginal follicle aspiration in cattle. Ovarian follicular wave emergence was synchronized in Holstein cows (N = 13) in the presence (groups 1 and 3) or absence (groups 2 and 4) of norgestomet implants. The largest follicle was aspirated at a diameter of 8 mm (groups 1 and 2) or 12 mm (groups 3 and 4). Ovarian follicles were visualized (transrectal ultrasonography) every 12 h after wave emergence. Follicular fluid samples were collected from the largest follicle and from the ensuing RF and concentrations of estradiol and progesterone were determined. After aspiration, 73.2% (52/71) of the follicles refilled with fluid, and a new antrum was detected 12 to 24 h later. Norgestomet did not affect (P > 0.05) RF occurrence or diameter, but in RF from group 4, concentrations of estradiol decreased (-530.7 ± 133.9 ng/mL; P < 0.01) whereas progesterone increased (+429.6 ± 171.7 ng/mL; P < 0.05) relative to preaspiration. In RF, there were three steroidogenesis patterns: (1) high estradiol concentration and high estradiol:progesterone ratio (estradiol-active RF); (2) low estradiol, but high progesterone concentrations (luteinized RF); and (3) low estradiol and low progesterone concentrations (inactive RF). Estradiol-active RF were more likely (P < 0.05) from follicles with high estradiol concentrations (regardless of diameter). In conclusion, fluid-filled structures (RF) with variable steroid production patterns are frequently formed after ultrasound-guided follicle aspiration. The occurrence and features of these RF depended on the diameter and status of these follicles before aspiration. 650 $asteroidogenesis 653 $aBovine 653 $aFollicle ablation 653 $aOPU 653 $aOvarian follicular atresia 653 $aOvary 700 1 $aDOREA, M. D. 700 1 $aSIQUEIRA, L. G. B. 700 1 $aARASHIRO, E. K. N. 700 1 $aCAMARGO, L. S. de A. 700 1 $aFERNANDES, C. A. C. 700 1 $aPALHAO, M. P. 773 $tTheriogenology$gv. 79, n. 2, p. 267-273, 2013.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
Data corrente: |
01/06/2016 |
Data da última atualização: |
21/06/2017 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
MANZKE, N. E.; PALHARES, J. C. P.; LIMA, G. J. M. M. de (org.). |
Afiliação: |
NAIANA EINHARDT MANZKE, UFPel; JULIO CESAR PASCALE PALHARES, CPPSE; GUSTAVO JULIO MELLO M DE LIMA, CNPSA. |
Título: |
Nutrição de precisão e manejo alimentar como formas de reduzir a poluição ambiental dos resíduos gerados na produção de suínos e aves. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
In: PALHARES, J. C. P. (Org.). Produção animal e recursos hídricos. São Carlos: Embrapa Pecuária Sudoeste, 2016. v. 1. p. 133-144. |
Idioma: |
Português |
Palavras-Chave: |
Suínos. |
Thesagro: |
Manejo; Nutrição; Poluição Ambiental. |
Thesaurus NAL: |
Aves. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143676/1/final8127.pdf
|
Marc: |
LEADER 00713naa a2200193 a 4500 001 2046056 005 2017-06-21 008 2016 bl uuuu u00u1 u #d 100 1 $aMANZKE, N. E. 245 $aNutrição de precisão e manejo alimentar como formas de reduzir a poluição ambiental dos resíduos gerados na produção de suínos e aves.$h[electronic resource] 260 $c2016 650 $aAves 650 $aManejo 650 $aNutrição 650 $aPoluição Ambiental 653 $aSuínos 700 1 $aPALHARES, J. C. P. 700 1 $aLIMA, G. J. M. M. de 773 $tIn: PALHARES, J. C. P. (Org.). Produção animal e recursos hídricos. São Carlos: Embrapa Pecuária Sudoeste, 2016.$gv. 1. p. 133-144.
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