Why does womb cancer happen?
It's not clear exactly what causes womb cancer, but certain things can increase your risk of developing it.
One of the main risk factors for womb cancer is higher levels of a hormone called oestrogen in your body.
A number of things can cause your oestrogen levels to be high, including obesity. There is also a small increase in the risk of womb cancer with long-term use of the breast cancer drug tamoxifen.
It's not always possible to prevent womb cancer, but some things are thought to reduce your risk. This includes maintaining a healthy weight and the long-term use of some types of contraception.
Read more about the causes of womb cancer.