Now, once our ovulation process actually takes place and we form the corpus luteum, then the corpus Lewdium begins to release our estrogen. So we have two structures inside our ovary that are capable of releasing our estrogen hormone. So estrogen is released by the ovarian follicle, which is the basic unit of the structure inside the ovary. It is also released by the corpus luteum, which is the portion of the follicle that is left behind in the ovary. Following the release of our ovum, the mature female gaming into our Peric mule cavity and eventually into the fallopium tube. Now, what exactly is the purpose of estrogen?