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Featured researches published by Rogerio Chaves Vieira.


Arquivo Brasileiro De Medicina Veterinaria E Zootecnia | 2005

Desenvolvimento morfológico dos ovários em embriões e fetos bovinos da raça Nelore

Elmo Gomes Diniz; Cesar Roberto Esper; José Octavio Jacomini; Rogerio Chaves Vieira

Faculdade de Medicina Veterinaria da Universidade Federal de Uberlândia, Av. Para 1720, 38408-283 - Uberlândia, MG


Ciencia Rural | 2008

Desenvolvimento morfológico dos ovários em fetos eqüinos sem raça definida

Christiana Savastano Naves; Rogerio Chaves Vieira; Elmo Gomes Diniz; José Octavio Jacomini; Marcelo Emílio Belleti; Rafael Carvalho de Oliveira

This research research was aimed at histologically characterizing the pre-natal ovarian development of cross-breed equine fetuses in the tropics, observing the rise and the quantification of oogonia and follicles. One hundred and thirty one fetuses were obtained from a slaughterhouse, their crown-rump length (CRL) was measured in centimeters (cm). Next, the gonads were sectioned and the samples were placed to rest in Bouin´s liquid for 24 hours. The ages were estimated by regression. 7µm thick histological ovarian cuts were prepared and stained with hematoxylin-eosin. Oogonia, primordial, growing and antral follicles were observed in fetuses whose CRL was between 4.1 and 6.5cm (40 to 49 gestation days (GD)); 9.1 and 12.0cm (60 to 69 GD); 23.1 and 29.0cm (116 to 135 GD); 50.1 and 65.0cm (201 to 245 GD) respectively. The maximum amount of oogonia and of primordial, growing and antral follicles occurred in fetuses whose CRL was between 4.1 and 6.0cm (40 to 49 GD); 16.1 and 23.0cm (90 to 115 GD); 29.1 and 36.0cm (136 to 155 GD); 50.1 and 97.0cm (201 to 320 GD), respectively. These results suggest that the development of cross-breed equine ovarian fetuses in the tropics is more premature than that described in the literature on studies of various equine breeds in temperate regions.


Ciencia Rural | 2002

Incidência de perda de prenhez até o 50º dia em éguas quarto de milha

Marcelo Barbanti Duarte; Rogerio Chaves Vieira; Frederico Ozanan Carneiro e Silva

The objective of this study was to evaluate the incidence of pregnancy loss, considering the periods of occurrence, reproductive status, as well as the different age groups. During the breeding seasons of 1998/1999 and 1999/2000 (September to January) the gestations of 445 Quarter Horse mares with ages from 3 to 20 years were monitored, comprehending maiden, barren and lactating. Pregnancy diagnostic was performed by ultrasonography at the 11th day after ovulation and repeated on days 20, 30, 40 and 50. The mares were distributed in groups from I to IV, corresponding to pregnancy losses between days 11 to 20, 21 to 30, 31 to 40 and 41 to 50, respectively. The overall pregnancy loss rate was 8.53% (38/445), being of 5.39% (24/445); 1.57% (7/445); 1.12% (5/445) and 0.45% (2/445) for groups I, II, III and IV, respectively. The unique and significant incidence (P 0.05) concerning reproductive status and age groups.


Bioscience Journal | 2004

Avaliacao da cromatina espermatica em eqüinos com azul de Toluidina e “Acridine orange

Christiana Savastano Naves; Marcelo Emílio Beletti; Marcelo Barbanti Duarte; Rogerio Chaves Vieira; Elmo Gomes Diniz; José Octavio Jacomini


Brazilian Journal of Veterinary Research and Animal Science | 2007

Morfogênese do testículo de embriões e fetos de vacas da raça nelore (Bos taurus indicus)

José Octavio Jacomini; Cesar Roberto Esper; Elmo Gomes Diniz; Rogerio Chaves Vieira; Marcelo Emílio Beletti


Veterinaria noticias | 2006

Influencia das estacoes seca e chuvosa sobre as caracteristicas seminais de touros das racas Nelore, Gir e Holandes criados a pasto

Katiana Mello de Oliveira; Adriana Mendes Duarte; Mara Regina Bueno de Mattos Nascimento; Elmo Gomes Diniz; Marcelo Tavares; Rogerio Chaves Vieira


Bioscience Journal | 2006

RELACAO ENTRE A MORFOLOGIA DO CORPO LUTEO E INDICES DE PRENHEZ EM RECEPTORAS DE EMBRIOES BOVINOS

Rogerio Chaves Vieira; Rossana Vilela Rezende Franco; Elmo Gomes Diniz; José Octavio Jacomini


Bioscience Journal | 2006

Effect of phenylbutazone on pregnancy rates of embryo recipient mares

Marcelo Barbanti Duarte; Rogerio Chaves Vieira


Ciencia Rural | 2008

Desenvolvimento morfolgico dos ovrios em fetos eqinos sem raa definida

Christiana Savastano Naves; Rogerio Chaves Vieira; Elmo Gomes Diniz; José Octavio Jacomini; Marcelo Emílio Belleti; Rafael Carvalho de Oliveira


Veterinária Notícias Veterinary News | 2006

USO DE INSEMINAÇÃO ARTIFICIAL EM CADELAS DA RAÇA BULLDOG

José Octavio Jacomini; Guilherme Nascimento Cunha; Carla Fagundes Moreira; Elmo Gomes Diniz; Rogerio Chaves Vieira

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José Octavio Jacomini

Federal University of Uberlandia

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Elmo Gomes Diniz

Federal University of Uberlandia

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Marcelo Barbanti Duarte

Federal University of Uberlandia

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Marcelo Emílio Beletti

Federal University of Uberlandia

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Marcelo Emílio Belleti

Federal University of Uberlandia

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Marcelo Tavares

Federal University of Uberlandia

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Carla Fagundes Moreira

Federal University of Uberlandia

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Guilherme Nascimento Cunha

Federal University of Uberlandia

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