In Britain the average age for the onset of the perimenopause is around 50, spanning ages between 45 and 55.
However a number of women experience symptoms of the menopause earlier than this and this is known as a “Premature Menopause”.
Overall 15% of women experience a premature menopause, with most of these being between the ages of 40 and 45. However one in a hundred experience this condition in their 30’s and one in a thousand in their 20’s.