Female contraception can work in different ways depending on the type of female contraception you opt for.
Hormonal contraceptives, such as the combined pill or the vaginal ring, contain hormones that work to prevent pregnancy. They usually do this by stopping the body from ovulating, but there are other ways they prevent pregnancy. The combined pill, for example, makes it harder for sperm to reach and fertilise an egg by thickening the mucus in the neck of the womb.
Non-hormonal contraceptives work differently to those that contain hormones, but still work to prevent pregnancy. For example, the female condom acts as a barrier method of contraception, that is worn inside the vagina to stop sperm from reaching an egg.