{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T15:52:23Z","timestamp":1759938743537},"reference-count":29,"publisher":"FapUNIFESP (SciELO)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Bras. Med. Vet. Zootec."],"published-print":{"date-parts":[[2005,8]]},"abstract":"<jats:p>Realizou-se uma an\u00e1lise estereol\u00f3gica comparativa de complexos cumulus-ov\u00f3cito (COCs) de bovino da ra\u00e7a Holtein-Friesian aspirados de fol\u00edculos antrais pequenos (com di\u00e2metro de 1-4mm) e m\u00e9dios (com di\u00e2metro de 4-8mm) durante as fases de metaestro, diestro e de proestro. Foram estimados o volume m\u00e9dio dos COCs, dos ov\u00f3citos (com e sem zona pel\u00facida), dos n\u00facleos dos ov\u00f3citos e das c\u00e9lulas foliculares e seus respectivos n\u00facleos. Estimou-se a espessura da zona pel\u00facida e calculou-se a percentagem relativa da freq\u00fc\u00eancia dos diferentes tipos de c\u00e9lulas foliculares encontradas no cumulus. Os fol\u00edculos pequenos apresentaram crescimento acelerado e sem sincronia entre o volume do citoplasma e o do n\u00facleo. No fol\u00edculo m\u00e9dio ocorreu expans\u00e3o harmoniosa n\u00facleo-citoplasm\u00e1tica. Identificaram-se tr\u00eas popula\u00e7\u00f5es de c\u00e9lulas foliculares (C1, C2 e C3), cuja distribui\u00e7\u00e3o na massa do cumulus \u00e9 independente de sua posi\u00e7\u00e3o relativamente ao ov\u00f3cito. Durante o ciclo estral, as c\u00e9lulas C1 foram progressivamente substitu\u00eddas por C2 e estas, por C3.<\/jats:p>","DOI":"10.1590\/s0102-09352005000400007","type":"journal-article","created":{"date-parts":[[2006,1,9]],"date-time":"2006-01-09T12:39:05Z","timestamp":1136810345000},"page":"465-475","source":"Crossref","is-referenced-by-count":2,"title":["Estudo estereol\u00f3gico comparativo de complexos cumulus-ov\u00f3cito aspirados de fol\u00edculos durante o ciclo estral em bovinos"],"prefix":"10.1590","volume":"57","author":[{"given":"A.M.","family":"Calado","sequence":"first","affiliation":[{"name":"Universidade de Tr\u00e1s-os-Montes e Alto Douro Apartado 202,  Portugal"}]},{"given":"E.","family":"Rocha","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugal"}]},{"given":"A.","family":"Cola\u00e7o","sequence":"additional","affiliation":[{"name":"Universidade de Tr\u00e1s-os-Montes e Alto Douro Apartado 202,  Portugal"}]},{"given":"M.","family":"Sousa","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugal"}]}],"member":"530","reference":[{"key":"ref1","first-page":"123","article-title":"Classification of isolated ovarian follicles using the nucleator: estimation of antral volume","volume":"8","author":"BAGGER P.V.","year":"1989","journal-title":"Acta Stereol."},{"key":"ref2","doi-asserted-by":"crossref","first-page":"724","DOI":"10.1016\/0002-9378(93)90523-L","article-title":"Total number of particles in a bounded region estimated directly with the nucleator: granulosa cell number in ovarian follicles","volume":"168","author":"BAGGER P.V.","year":"1993","journal-title":"Am. 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