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Comparative stereological study of cumulus-oocyte complexes aspirated from follicles during the estrous cycle in bovine [Estudo estereológico comparative de complexes cumulus-ovócito aspirados de folículos durante o ciclo estral em bovinos]

Title
Comparative stereological study of cumulus-oocyte complexes aspirated from follicles during the estrous cycle in bovine [Estudo estereológico comparative de complexes cumulus-ovócito aspirados de folículos durante o ciclo estral em bovinos]
Type
Article in International Scientific Journal
Year
2005
Authors
calado, am
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
colaço, a
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Journal
Vol. 57
Pages: 465-475
ISSN: 0102-0935
Indexing
Publicação em ISI Web of Knowledge ISI Web of Knowledge
Other information
Authenticus ID: P-007-EXG
Abstract (EN): A comparative stereological analysis was performed in cumulus-oocyte complexes from Holstein-Friesian cows, aspirated from small (with diameter of 1-4mm) and medium (with diameter of 4-8mm) antral follicles during metestrous, diestrous and proestrous. The mean volumes of COCs, oocytes (with and without zonapellucida), nucleus of the oocyte, as well as the volumes of the follicular cells and their nucleus were estimated. The mean thickness of the zona pellucida and the relative percentage of the three follicular cell types in the cumulus mass were also obtained. Small antral follicles had an accelerate growth without synchrony between the volume of the oocyte and the respective nucleus, while in medium antral follicles an harmonious nucleus-cytoplasmic expansion was observed. These follicular cell populations were classified in their types, C1, C2 and C3, which the distribution in the cumulus mass appeared to be independent to their position in relation to the oocyte. During the estrous cycle, cell type C1 progressively developed to C2, and this one to C3.
Language: Portuguese
Type (Professor's evaluation): Scientific
No. of pages: 11
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