Final answer:
In the luteal phase of the ovarian cycle, progesterone secreted by the corpus luteum inhibits the secretion of FSH and LH, thus preventing the maturation of additional follicles and maintaining the endometrium for potential embryo implantation.
Step-by-step explanation:
In the luteal phase of the ovarian cycle, progesterone inhibits FSH and LH secretion. After the release of the egg during ovulation, the corpus luteum is formed which secretes progesterone. This hormone serves various functions, one of which is to prevent the maturation of further follicles by inhibiting the secretion of FSH and LH from the pituitary gland. By keeping FSH and LH levels low, ensures that no other follicles develop and that the endometrium is maintained for the potential implantation of a fertilized egg. If pregnancy does not occur, the corpus luteum degrades, leading to a decrease in progesterone levels, which then initiates the shedding of the endometrium and the start of menstruation.