Premenopausal women are individuals who have not yet reached menopause, which is typically defined as the cessation of menstrual periods for 12 consecutive months. Research focusing on premenopausal women often examines various aspects of women's health and reproductive function during their childbearing years. This can include studies on hormonal fluctuations, fertility, menstrual cycles, pregnancy, and gynecological conditions such as polycystic ovary syndrome and endometriosis. Understanding the unique health needs and challenges faced by premenopausal women is important for improving overall women's health and well-being.