Gedarel 30/150 is what’s known as a combined oral contraceptive pill, commonly called ‘the Pill’. It comes in strips of 21 pills, each marked by the days of the week. Gedarel 30/150 contains synthetic versions of the two female sex hormones, progesterone and oestrogen, which are called desogestrel and ethinylestradiol. Together, these hormones will prevent you from getting pregnant, just as your natural hormones make it impossible for you to conceive again if you are already pregnant. If taken properly, Gedarel 30/150 is over 99% effective in preventing pregnancy. You can also postpone your monthly period when taking Gedarel 30/150. This is completely safe, and a very useful option for some women.