Perimenopause is the transitional stage before menopause, often starting in the mid-40s but sometimes earlier. It is marked by hormonal fluctuations, especially declining estrogen, leading to symptoms like irregular periods, hot flashes, mood swings, sleep disturbances, and changes in metabolism. This phase can last several years and is often misunderstood or overlooked, leaving many individuals unprepared for the physical and emotional changes it brings. Understanding perimenopause is essential for managing symptoms effectively and maintaining overall well-being. Early signs may include changes in menstrual cycles, fatigue, anxiety, brain fog, and reduced libido. Because hormone levels fluctuate unpredictably, symptoms can vary widely from person to person, making the experience unique for everyone.