* High progesterone levels prompt the uterus to prepare a suitable environment for development of the embryo, and eventual [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Implantation-_Anatomy_%26_Physiology|attachment of the conceptus to the endometrium]] (implantation). | * High progesterone levels prompt the uterus to prepare a suitable environment for development of the embryo, and eventual [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Implantation-_Anatomy_%26_Physiology|attachment of the conceptus to the endometrium]] (implantation). |