Perimenopause is the transitional period leading up to menopause in a woman's life. It typically begins in a woman's 40s and can last anywhere from a few months to several years. During this time, a woman's hormone levels begin to fluctuate and decline, leading to symptoms such as irregular periods, hot flashes, mood swings, and changes in libido. Women may also experience symptoms such as weight gain, sleep disturbances, and changes in skin and hair quality. Research in the field of perimenopause focuses on understanding the physiological and hormonal changes that occur during this transitional period, as well as developing effective treatments to manage the symptoms associated with perimenopause. Studies also seek to identify risk factors for complications associated with perimenopause, such as osteoporosis and cardiovascular disease, and explore lifestyle factors that may influence the experience of perimenopause. Ultimately, the goal of research in this area is to improve the quality of life for women as they navigate this significant stage in their reproductive lives.