The progestogen-only pill is a little different to Evelyn as it only contains one hormone, progestogen, which is a form of progesterone. There’s no oestrogen in the progestogen only pill, so if you can’t take a combined pill because of the oestrogen in it, this type of pill may be more suitable for you.
Like Evelyn, and other combined contraceptive pills, the progestogen only pill is more than 99% effective when it’s taken correctly. But rather than taking a pill for 21 days and then taking 7 placebo pills for 7 days at the end of a strip, you take an active progestogen only pill every day, with no breaks between packs of pills.