What happens during the menustrual cycle if an egg is not fertilized?

If an egg is not fertilized during the menstrual cycle, it will eventually disintegrate and be reabsorbed by the body. The levels of hormones such as estrogen and progesterone will drop, leading to the shedding of the uterine lining, which is expelled from the body as menstrual bleeding. This process typically occurs around 14 days after ovulation, marking the start of a new menstrual cycle.