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Title: Degeneration rate of preantral follicles in the ovaries of goats
Authors: Silva, José Roberto Viana
Ferreira, Marcos Antônio Leal
Costa, Sonia Helena Furtado
Santos, R.R
Carvalho, Fabíola Christian Almeida de
Rodrigues, Ana Paula Ribeiro
Luccia, Carolina Madeira
Báo, Sônia Nair
Figueiredo, José Ricardo de
Assunto:: Folículos pré-antrais
Caprino - morfologia
Morfologia (Animais)
Ovários - morfologia - caprino
Issue Date: Mar-2002
Publisher: Elsevier
Citation: SILVA, J.R.V, et al. Degeneration rate of preantral follicles in the ovaries of goats. Small Ruminant Research, v. 43, n. 3, p. 203-209, mar. 2002. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0921448802000172>. Acesso em: 12 fev. 2015.
Abstract: The degeneration rate of ovarian preantral follicles in goats, and the distribution in the follicular classes (primordial, primary or secondary) was assessed. Ovaries from adult goats were collected at a local slaughterhouse. To evaluate the morphology of the caprine preantral follicles in situ, one fragment from each ovary was fixed individually in Carnoy for 12 h, sectioned serially at a thickness of 7 μm and stained with Periodic Acid Shiff-hematoxylin. Preantral follicles were then classified according to the stage of development. Preantral follicles were classified individually either as morphologically normal; as Type 1 degenerated follicles (only the oocyte was degenerated); or as Type 2 degenerated follicles (when degeneration occurred at both oocyte and granulosa cells). The total examined was 235 primordial, 195 primary and 101 secondary follicles. The distribution of degenerated follicles as primordial, primary and secondary follicles was 8.5, 14.3 and 16.8%, respectively. When Types 1 and 2 degenerated follicles were pooled, secondary follicles were significantly more degenerated than primordial and primary follicles. When degeneration Types 1 and 2 was compared in each follicular class, a higher (P<0.05) percentage of Type 1 degeneration was observed in primordial and primary follicles. Conversely, secondary follicles were significantly more affected by Type 2 degeneration. When the follicular classes were taken together, a significantly higher percentage of Type 1 degenerated preantral follicles was observed when compared with Type 2 degenerated follicles (P<0.05). In conclusion, a low percentage of degenerated preantral follicles was observed and secondary follicles were more affected by degeneration than primordial follicles. Thus, primordial follicles constitute a large and potentially valuable source of oocytes for reproductive programs after in vitro growth and maturation.
Licença:: Este Manuscrito do Autor Aceito para Publicação (AAM) é protegido por direitos autorais e publicado pela Elsevier. Ele esta disponível neste Repositório, por acordo entre a Elsevier e a Universidade de Brasília. As alterações decorrentes do processo de publicação - como a edição, correção, formatação estrutural, e outros mecanismos de controle de qualidade - não estão refletidas nesta versão do texto. A versão definitiva do texto foi posteriormente publicado em [Small Ruminant Research, Volume 43, Número 3, Março de 2002, Páginas 203–209, doi:10.1016/S0921-4488(02)00017-2]. Você pode baixar, copiar e utilizar de outra forma o AAM para fins não comerciais , desde que sua licença seja limitada pelas seguintes restrições: (1) Você pode usar este AAM para fins não comerciais apenas sob os termos da licença CC- BY- NC-ND. (2) A integridade do trabalho e identificação do autor, detentor dos direitos autorais e editor deve ser preservado em qualquer cópia. (3) Tem de atribuir este AAM no seguinte formato: [acordo na linguagem atribuída, incluindo o link para CC BY-NC-ND licença Digital + DOI do artigo publicado na revista Elsevier ScienceDirect ® da plataforma].
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