Altrenogest is one of the drug items in the game.
About
Altrenogest is a synthetic progesterone, that helps suppress mare cycling by mimicking the natural levels of progesterone the mare's body would produce during pregnancy. It is typically given by feeding once daily.
Crafting
Users in the Pharmaceutical Sciences stream can craft altrenogest at the Workshop. It takes approximately 18 hours (or 9 show rollovers) to craft.
Use