Part one of term paper
The Hypothalamus releases the gonadotropin-releasing hormone(GnRH). This hormone actives the pituitary gland to release the follicle-stimulating hormone(FSH) and the luteining hormone(LH). FSH is carried by the blood to the ovaries, where the follicle development is stimulated. The follicles secretes estrogen which initiates the mormation of ...

Part two of term paper
... and progesterone to incease the development of the endometrium and prevent uterine contractions. If there is no fertilization of the egg, high levels of estrogen and progesterone activate and negative feedback inhibiting the release of FSH and LH. Without FSH and LH the corpus luteum deteriorates causing uterine contraction to expell the endometrium. However, if the egg is fertilized the level of estrogen and progesterone must remain high so the endometrium is not shed. The outer layer of the ...