Progestogen-only pills (POPs) contain a progestogen hormone. This is similar to the natural progesterone produced by the ovaries.
Different POPs contain different types of progestogen. POPs with a type called desogestrel are named where relevant on this page. If you’re not sure what type of progestogen is in your POP, check the patient information leaflet inside your pack or ask your doctor or nurse. POPs are different to combined pills because they don’t contain the hormone estrogen.