As mentioned,
menopause specifically refers to your ‘last menstrual period’. Although the term is used more generally, medically, you’ve reached menopause 12 months after your last period.
1,3
The average age of menopause varies from person to person. Reaching menopause before the age of 45 is called ‘early menopause’, for example, which affects about one in 20 people. Whereas menopause before the age of 40 is called ‘premature menopause’ or premature ovarian insufficiency (POI) and only affects one in 100 people.9
Many factors affect the age at which you might naturally reach menopause.10
Genetics can appear to play a role. For example, if your mother had an early menopause, you may have a higher chance of experiencing an early menopause too.5,11
However, there are several other influencing factors thought to be at play, including the age you got your first period, whether you smoke, how much you drink, how much you exercise, the number of children you’ve had, and your use of oral contraception.10,12