question_answer

Describe how the changing levels of FSH, LH and progesterone, during menstrual cycle, induce changes in the ovary and the uterus in human females?

Answer:

The secretion of gonadotropins, i.e. LH and FSH increases gradually during the follicular phase. FSH stimulates follicular development as well as secretion of oestrogens by the growing follicles. The rapid secretion of LH during mid - cycle induces rupturing of Graafian follicle and thereby the release of ovum. The remaining cells of the ovarian follicle are stimulated by the LH to develop into corpus luteum. This corpus luteum secretes large amount of progesterone, which is essential for the maintenance of endometrium which is important for the implantation of the fertilised ovum.