The role of luteinizing hormone is as follows: First, during the luteal phase, the role of luteinizing hormone is mainly to stimulate follicular membrane cells to synthesize androgens, and also to provide substances for the synthesis of estradiol. The increase of androgen level can improve women’s libido during ovulation and increase women’s conception function, while the increase of estrogen level can promote the growth of follicles and also promote the discharge of follicles. Secondly, luteinizing hormone can promote the final development of oocytes into mature cells before ovulation, and it can promote follicle discharge when it reaches its peak before ovulation. Thirdly, after ovulation, the follicle collapse will gradually form the corpus luteum, and luteinizing hormone can play a role in maintaining the function of the corpus luteum and promoting the secretion of progesterone during this period of time.