Oocyte
female gametocyte or germ cell involved early in reproduction; immature precursor of ovum produced in the ovary during female gametogenesis
An oocyte (, oöcyte, or ovocyte) is a female germ cell involved in sexual reproduction. An oocyte is an immature ovum, an immature egg cell produced in a female fetus in the ovary during gametogenesis. During oogenesis, the oogonia become primary oocytes. An oocyte is a form of genetic material that can be collected for cryopreservation.
Formation
The formation of an oocyte is called oocytogenesis, which is a part of oogenesis. Oogenesis results in the formation of both primary oocytes during fetal period, and of secondary oocytes after it as part of ovulation.
Characteristics
Oolemma
The oolemma is the cell membrane of an oocyte: The oolemma, is not consistent with a lipid bilayer as the bilayer is not present and does not consist of lipids. Rather, the structure has an inner layer, the fertilization envelope, and the exterior is made up of the zona pellucida (vitelline membrane in non-mammals), which is made up of glycoproteins; however, channels and proteins are still present for their functions in the membrane.
Cytoplasm
Oocytes are rich in cytoplasm, which contains yolk granules to nourish the cell early in development.
Nucleus
During the primary oocyte stage of oogenesis, the nucleus is called a germinal vesicle.
This brief starts where responsible research should: with the source description of “Oocyte” as female gametocyte or germ cell involved early in reproduction; immature precursor of ovum produced in the ovary during female gametogenesis. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as female gametocyte or germ cell involved early in reproduction; immature precursor of ovum produced in the ovary during female gametogenesis. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 20, 2026. The linked authority identifier is Q3246226. None of the 0 selected statements returned an explicit reference.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Oocyte” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.