Menopause is not a single event but a gradual transition that unfolds over several years. It is divided into three key stages: perimenopause, menopause, and postmenopause. Each phase represents a unique set of hormonal changes and physical or emotional symptoms that affect women differently.

Perimenopause is the first stage and often begins in the late 30s or 40s. During this time, estrogen levels fluctuate, leading to irregular periods, mood swings, hot flashes, and sleep disturbances. This stage can last several years and is often the most symptom-intensive phase.