Figure 1: The structures of the androstene hormones. The androstene hormones are shown with the cycloperhydrophenanthrene ring. All steroids have a C3 hydroxyl group in the (β) beta position. The C7 hydroxyl group of androstenetriol is in the β-position. The C17 hydroxyl of androstenediol epimers are in either the (α) alpha or (β) beta position.