Menopause is a natural biological process that occurs in women typically between the ages of 45 and 55, marking the end of their menstrual cycles and fertility. It is characterized by a decrease in the production of estrogen and progesterone hormones by the ovaries, leading to symptoms such as hot flashes, night sweats, mood swings, and changes in libido. Menopause is considered complete when a woman has not had a menstrual period for 12 consecutive months.