LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Progesterone. Molecular model of the steroid hormone progesterone (C21.H30.O2), involved in the female menstrual cycle, pregnancy and embryogenesis. It is an endogenous hormone, produced by the body. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red). Illustration.
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