The process of menopause does not happen overnight. Rather, there are three distinct stages. It begins with perimenopause. This is the time when the level of estrogen in the body gradually decreases. It is followed by menopause, wherein eggs are no longer produced and menstruation halts. The last stage is post-menopause, which is characterized by different symptoms such as hot flashes. In the next paragraphs, you will learn about some of the symptoms that you are already entering your menopausal stage.