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Germinal vesicle

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Definition

noun

The large nucleus of the primary oocyte before meiosis is completed and polar bodies are formed.


Supplement

At birth, the germinal vesicle is and remains to be diploid until puberty is reached. It is because the maturation of primary oocyte into a fertilizable form by meiosis halts at the diplotene stage of prophase I and resumes only when puberty is reached.


See also: primary oocyte, diplotene.