There are several different cancer screening programmes targeted at different age groups, some are also specific to a specific sex because they relate to reproductive organs.
About 1 in 8 women in the UK are diagnosed with breast cancer during their lifetime. If it's detected early, treatment is more successful and there's a good chance of recovery.
Breast screening aims to find breast cancers early. It uses an X-ray test called a mammogram that can spot cancers when they're too small to see or feel.
But there are some risks of breast cancer screening that you should be aware of.
As the likelihood of getting breast cancer increases with age, all women aged from 50 to their 71st birthday, and registered with a GP are automatically invited for breast cancer screening every 3 years.
In the meantime, if you're worried about breast cancer symptoms, such as a lump or area of thickened tissue in a breast, or you notice that your breasts look or feel different from what's normal for you, do not wait to be offered screening – see your GP.