There are two types of pill, the combined pill and the progestogen-only pill.
The combined pill contains oestrogen and is more commonly used because the bleeding pattern which results is more predictable.
The progestogen-only pill can be used if someone can’t take oestrogen for health reasons. It does produce an unpredictable bleeding pattern, and some of these pills have to be taken during precise times of the day.
You can download leaflets on all forms of contraception from the Family Planning Association's website.