Keywords: Progesterone-3D-spacefill.png Space-filling model of the progesterone molecule a steroid hormone that controls the menstrual cycle Colour code 505050 Carbon C black<br> F0F0F0 Hydrogen H white<br> F51E1E Oxygen O red<br> 2011-03-12 own DS Visualizer Jynto talk Ball-and-stick version Skeletal stick version cc-zero Progesterone Space-filling models Images by Jynto |