LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Relaxin hormone molecule. Computer model showing the secondary structure of a molecule of the hormone relaxin. The alpha helices (ribbons) of the secondary structure can be seen. Relaxin is part of the family of insulin-like hormones. In women it is produced by the breast, the corpus luteum in the ovary and, during pregnancy, by the placenta, chorion, and decidua. It rises to a peak within approximately 14 days of ovulation and then declines in the absence of pregnancy, resulting in menstruation. In men it is produced by the prostate and aids sperm motility.
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