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Ovarian follicle, light micrograph

Ovarian follicle, light micrograph

C028/6618

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Credit

MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY

Caption

Light microscopy of a growing ovarian follicle, classified as a secondary follicle due to multiple layers of follicular (granulosa) cells surrounding the central oocyte (egg). Follicular cells multiply by mitosis and are stimulated by follicle-stimulating hormone (FSH) produced by the pituitary gland. Granulosa cells secrete estrogen. The oocyte is enclosed by a protein barrier called the zona pellucid that ensures only one sperm can merge with the oocyte during fertilization. Magnification x520 when printed at 10cm.

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Model release not required. Property release not required.

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