Progesterone hormone crystals

Credit: 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. Magnific- ation: X 40 at 35mm size, X 80 at 6x7cm size.

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Keywords: biochemical, biochemistry, chemical, chemistry, compound, compounds, contraception, crystal, crystals, hormone, images, magnified image, microscopic photos, progesterone, sex hormone, subjects

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