germinal vesicle


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germinal vesicle

[′jər·mən·əl ′ves·ə·kəl]
(cell and molecular biology)
The enlarged nucleus of the primary oocyte before reduction divisions are complete.
References in periodicals archive ?
In-vitro maturation of human germinal vesicle stage oocytes: role of cumulus cells and epidermal growth factor in the culture medium.
Follicular relic formation and appearance in the distal area of an ovariole and anterior lateral oviduct (loa) with the germinal vesicle (gv), oocyte with yolk (oy), follicular epithelium (fe) beginning to slough off into the ovariole base (as shown by the arrow), follicular relics (fr), and collar in Megamelus scutellaris.
Comparison of different vitrification procedures on developmental competence of mouse germinal vesicle oocytes in the presence or absence of cumulus cells.
Effects of protein kinase C activators on germinal vesicle breakdown and polar body emission of mouse oocytes.
Correlation of G6PDH activity with germinal vesicle stage chromatin configurations
Comparison of different vitrification procedures on developmental competence of the mouse germinal vesicle oocytes in the presence or absence of cumulus cells.
In vitro maturation and fertilization of goat oocytes frozen at the germinal vesicle stage.
Inositol trisphosphate, inositol phospholipid metabolism, and germinal vesicle breakdown in surf clam oocytes.
Sequencing of the 18S rRNA gene revealed a 99% affinity of the masses with three holothurian species, whereas microscopic observations clarified the nature of the structures: (1) their size is equivalent to that of normal oocytes present in the lumen of the tubules, (2) they display a germinal vesicle containing one or several nucleoli, and (3) this germinal vesicle lies within a developed cytoplasm filled with yolk granules containing a crystalloid structure, as reported in several other echinoderm species (Smiley, 1990).
2D) are distinguished by the prominence of hydrated oocytes still inside the ovarian follicles and may also contain degenerating POFs from an earlier spawning, but they noticeably lack oocytes in the germinal vesicle breakdown state (GVBD).
Nevertheless, when maturation was evaluated by meiosis development, for each heat shock treatment (HS1, HS2), greatest number of oocytes was not progressing to MetaphaseII (MII), and most of them got arrested in the stages between germinal vesicle breakdown (GVBD) and Telophase I (Table 4).
Dimethyl sulfoxide (DMSO) and PROH at a concentration of 6 M were used as cryoprotectant agents (CPAs) to vitrify oocytes at germinal vesicle stage (GV) or in vitro matured oocytes at metaphase II stage (M II).