This chapter discusses perimenopause and menopause. It defines perimenopause as the one to ten year period before menopause where a woman experiences hormonal fluctuations and changes. Menopause is defined as the final menstrual period after which a woman is infertile. The chapter lists common changes during early perimenopause such as irregular periods, night sweats, and mood changes. It provides facts about perimenopause, the role of hormones, and overall recommendations for women's health during this time.