Plants capable of making progesteroneScientists have reported the first discovery of the female sex hormone, progesterone, in a plant. This finding is considered by many as an overturn from conventional wisdom.

The discovery was reported in the American Chemical Society’s Journal of Natural Products, a monthly publication.

The involved researchers made use of two powerful laboratory techniques, nuclear magnetic resonance and mass spectroscopy, for detecting progesterone in leaves of the Common Walnut, or English walnut, tree.