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Ovarian follicle, light micrograph

Ovarian follicle, light micrograph

P632/0102

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Credit

JEAN-CLAUDE REVY, ISM / SCIENCE PHOTO LIBRARY JEAN-CLAUDE REVY, ISM / SCIENCE PHOTO LIBRARY

Caption

Ovarian follicle. Light micrograph of a section through a primary follicle in an ovary. At centre is the large nucleus of the developing egg (oocyte, pink). Surrounding the egg are cuboidal follicular cells (purple). At birth there are tens of thousands of primordial follicles, the precursors to primary follicles, present in the ovaries. Once sexual maturity is reached, up to 20 primordial follicles are triggered to start developing into primary follicles every menstrual cycle. Only one will reach full maturity and release its egg (ovum) at ovulation.

Release details

Model release not required. Property release not required.

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