* Causes luteolysis to remove the progesterone block keeping the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|uterus]] quiescent. | * Causes luteolysis to remove the progesterone block keeping the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|uterus]] quiescent. |