I don't know if you meant Menopause. Menopause typically (but not always) occurs in women in midlife, during their late 40s or early 50s, and signals the end of the fertile phase of a woman's life. This may result in the decline of their sex drive.
Menstropause, also known as perimenopause, is the transitional period leading to menopause when a woman's menstrual cycles become irregular and eventually cease. It typically occurs in a woman's 40s or 50s, and is characterized by hormonal changes that can cause symptoms such as hot flashes, mood swings, and irregular periods.