In vitro maturation of domestic cat oocytes subjected to different incubation times




Domestic feline; First polar body; Maturation; Meiotic competence.


The aim of this study was to evaluate the effect of three different incubation times on in vitro maturation of domestic cat oocytes. Thus, ovaries (n = 42) were submitted to slicing procedure and the oocytes recovered were classified; only good quality oocytes (Grade I and II) underwent in vitro maturation for three different periods (24 vs. 30 vs. 36 h) in supplemented TCM-99 medium. After, oocytes were evaluated for cumulus cell expansion and presence of the first polar body. After six replicates (7 ± 1,7 ovaries per replicate), a total of 334 viable oocytes were recovered. Differences (p <0.05) were observed regarding the percentage of oocytes presenting expansion of the cumulus cells, where higher values were observed in the group of oocytes incubated for 36 h (84.3%), when compared to 30 (73.4%) and 24 h (71.0%). Moreover, differences were also observed regarding the presence of the first polar body (24 h: 29.7%; 30 h: 58.2%; 36 h: 69.8%). We conclude that the incubation period influenced the maturation rates, indicating 36 h as the ideal period for the in vitro maturation of domestic cat oocytes in supplemented TCM-199 medium.


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How to Cite

FERNANDES , D. P. .; SANTOS , F. A. dos .; MACÊDO, L. B. de .; IZZO, R. G. .; BARBOSA, B. de S. .; PIMENTEL, M. M. L. .; PEREIRA, A. F. .; BEZERRA, M. B. . In vitro maturation of domestic cat oocytes subjected to different incubation times. Research, Society and Development, [S. l.], v. 10, n. 3, p. e15710313074, 2021. DOI: 10.33448/rsd-v10i3.13074. Disponível em: Acesso em: 17 sep. 2021.



Agrarian and Biological Sciences