Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/48076
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dc.creatorVasconcelos, Gisvani Lopes de-
dc.creatorMaculan, Renata-
dc.creatorCunha, Ellen Vasconcelos da-
dc.creatorSilva, Anderson Weiny Barbalho-
dc.creatorBatista, Ana Liza Souza-
dc.creatorDonato, Mariana Aragão Matos-
dc.creatorPeixoto, Christina Alves-
dc.creatorSilva, José Roberto Viana-
dc.creatorSouza, José Camisão de-
dc.date.accessioned2021-09-08T19:14:14Z-
dc.date.available2021-09-08T19:14:14Z-
dc.date.issued2020-08-
dc.identifier.citationVASCONCELOS, G. L. de et al. Antral follicular count and its relationship with ovarian volume, preantral follicle population and survival, oocyte meiotic progression and ultrastructure of in vitro matured bovine cumulus–oocyte complexes. Zygote, Cambridge, v. 28, n. 6, p. 495-503, Dec. 2020. DOI: https://doi.org/10.1017/S0967199420000386.pt_BR
dc.identifier.urihttps://doi.org/10.1017/S0967199420000386pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/48076-
dc.description.abstractThis study aimed to evaluate the relationship between antral follicular count (AFC) and ovarian volume (OV), preantral follicular population and survival, meiotic progression and ultrastructure of cumulus–oocyte complexes (COCs) after in vitro maturation. In experiment 1, the relationship between AFC and preantral follicle population and survival was evaluated by classical histology. In experiment 2, the relationship among AFC, OV, ability of oocytes to resume meiosis and ultrastructure of in vitro matured bovine COCs was studied. A positive correlation (P < 0.05) between AFC and the numbers of healthy primordial, degenerate and total follicles was observed, as well as with healthy secondary follicles and total follicles. The numbers of grades I and II oocytes in ovaries of high AFC class were higher compared with those with intermediate or lower AFC. After in vitro maturation, COCs from ovaries of high AFC had a higher percentage of oocytes in metaphase II compared with those of intermediate and low AFC (P < 0.0001). Ovaries of intermediate AFC had a higher percentage of oocytes in metaphase II compared with ovaries with low AFC (P < 0.0001). The proportion of oocytes in metaphase I, telophase I and anaphase I in COCs from ovaries of intermediate AFC (26.04%) was higher (P < 0.05) compared with that seen in COCs of ovaries with high (8.55%) and low (14.15%) AFC. No differences in the ultrastructure of oocytes were seen. In conclusion, after in vitro maturation, cow ovaries with high AFC have higher numbers of oocytes that reach in metaphase II (MII), but they also have higher numbers of degenerated primordial and primary follicles.pt_BR
dc.languageenpt_BR
dc.publisherCambridge University Presspt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceZygotept_BR
dc.subjectCattlept_BR
dc.subjectIn vitro maturationpt_BR
dc.subjectMorphologypt_BR
dc.subjectOocyte qualitypt_BR
dc.subjectOvarian follicular reservept_BR
dc.subjectBovino - Reproduçãopt_BR
dc.subjectOócitos - Maturação in vitropt_BR
dc.subjectOócitos - Morfologiapt_BR
dc.subjectOócitos - Qualidadept_BR
dc.subjectReserva ovarianapt_BR
dc.titleAntral follicular count and its relationship with ovarian volume, preantral follicle population and survival, oocyte meiotic progression and ultrastructure of in vitro matured bovine cumulus–oocyte complexespt_BR
dc.typeArtigopt_BR
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