ISSN:
1573-7330
Keywords:
human oocyte
;
cytoplasmic polarization
;
cortical granules
;
metaphase II spindle
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The ultrastructure of preovulatory human oocyte—cumulus complexes was described after inducing maturation by clomiphene, human menopousal gonadotropin (hMG), human chorionic gonadotropin (hCG) treatment. The majority of the oocytes was at metaphase, II of meiosis, with a radially orientated spindle. The oocyte surface was covered by a multitude of microvilli. Cortical granules were nonuniformly distributed along the cortex. A cytoplasmic polarization was observed. The cytoplasmic organelles were in general uniformly dispersed, with the exception of a narrow segment within which cytoplasmic membranes and mitochondria formed clusters. The spirndle was usually found at the borderline between the two regions of the cytoplasm. The functional significance of this polarization is not yet known.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01132810
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