CHANGES AT THE HAMSTER OOCYTE SURFACE FROM THE GERMINAL VESICLE STAGE TO OVULATION

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dc.contributor.authorEBENSPERGER, C
dc.contributor.authorBARROS, C
dc.date.accessioned2025-01-23T19:43:46Z
dc.date.available2025-01-23T19:43:46Z
dc.date.issued1984
dc.description.abstractImmature and ovulated hamster oocytes were studied with the scanning electron microscope. Immature oocytes at the germinal vesicle stage have their surface uniformly covered by microvilli. When meiosis has progressed to the 1st meiotic metaphase the overlying surface shows the differentiation of a circular area 19 .mu.m in diameter with a low density of microvilli. Later, from this region the 1st polar body emerges, and the oocyte surface at the point from which it was extruded shows a cluster of cytoplasmic, conical projections. When the zona-free oocytes are cultured at 37.degree. C for 5 min these projections disappear and the oocyte surface and that point becomes smooth. When the oocytes remain in the oviduct for several hours after ovulatioin these projections remain unchanged. The in vitro interactions of capacitated hamster sperm with the immature oocyte was always seen at microvillus surfaces and never associated with the differentiated regions.
dc.fuente.origenWOS
dc.identifier.issn0148-7280
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/99811
dc.identifier.wosidWOS:A1984SY03200003
dc.issue.numero4
dc.language.isoen
dc.pagina.final397
dc.pagina.inicio387
dc.revistaGamete research
dc.rightsacceso restringido
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleCHANGES AT THE HAMSTER OOCYTE SURFACE FROM THE GERMINAL VESICLE STAGE TO OVULATION
dc.typeartículo
dc.volumen9
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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