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Progesterone hormone

Progesterone hormone

A618/0045

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Credit

DAVID PARKER / SCIENCE PHOTO LIBRARY DAVID PARKER / SCIENCE PHOTO LIBRARY

Caption

Polarised light micrograph of crystals of progesterone, a female sex hormone which is secreted monthly in the ovary and which stimulates development of the uterus to receive a fertilised egg and to nourish the embryo. In pregnancy, progesterone prevents menstruation and the release of more eggs; this characteristic of progesterone is the basis of the contraceptive pill. Magnification: x40 at 35mm, x80 at 6x7cm size.

Release details

Model release not required. Property release not required.

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