The menopause is sometimes known as the "change of life", and is marked by the ending of menstruation (when a woman's periods stop). In the UK, the average age for a woman to reach the menopause is 52.
The menopause is the end of egg production (ovulation). This occurs as a result of falling levels of the female sex hormone, oestrogen, which regulates menstruation.
A woman’s periods do not usually stop suddenly, although this can happen. They usually become less frequent, the odd period is missed, and then they stop altogether.
A woman is said to have reached the menopause once she has not had a period for one year. After this point, she can be described as post-menopausal. The time leading up to the menopause is known as the peri-menopause.
During the peri-menopause, the hormonal and biological changes that are associated with the menopause begin. As a result of these hormonal changes, many women experience both physical and emotional symptoms.