SciELO - Scientific Electronic Library Online

 
vol.34 número1Production and decomposition of leaf litter from forest species in silvopastoral systems, Valle del Sinu, ColombiaConsumers perceptions about the welfare of farm animals in Colombia índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Agronomía Mesoamericana

versão On-line ISSN 2215-3608versão impressa ISSN 1659-1321

Resumo

NEIRA-RIVERA, Eliana et al. Morphometric of ovaries, follicles, and their relationship with oocyte quality in cattle. Agron. Mesoam [online]. 2023, vol.34, n.1, 50156. ISSN 2215-3608.  http://dx.doi.org/10.15517/am.v34i1.50156.

Introduction. Studies on the structural characteristics of the ovary associated with the quality of the cumulus-oocyte complex (COCs) in cattle contribute to the definition of strategies to improve reproductive efficiency. Objective. To determine the weight and size of the ovaries, follicle quality, and COCs in Zebu females, in order to establish differences between the right and left ovary. Materials and methods. Between March and July 2017, 52 ovaries were obtained from twenty-six Zebu cows. The ovaries and follicles were weighed and measured. The follicles were grouped into three categories: a) <3 mm (TFI), b) 3-6 mm (TFII) and c) >6 mm (TFIII). The follicles quality was determined by the irrigation-translucency technique (TIT) and the COCs by the characteristics of the cytoplasm and cumulus cells as good (CI), fair (CII), and poor (CIII), and by cresyl brilliant blue test were categorized as BCB+ and BCB-. Results. Ovarian length, width and weight were 2.7 ± 0.6 cm, 1.8 ± 0.5 cm, and 7.0 ± 3 g, respectively, with differences for length and weight between the right and left ovary (p<0.01). The highest number of follicles were obtained in TFI (p<0.05). The 88.56 % of the follicles evaluated were of good quality. A total of 52 % and 44.2 % of COCs were classified as CI and BCB+, respectively. When follicle size and COC quality were considered, it was shown that in the TFI group 22 % were IC, 34 % CII, and 44 % CIII, and in the TFII group 31 % were IC, 21 % CII and 48 % CIII. No differences were observed between left and right ovary. Conclusion. The right ovary presented a greater size and weight, a greater number of follicular structures and a greater number of good quality CCOs.

Palavras-chave : oocyte quality; ovaries size; follicle size.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )