How long it takes for birth control pills to get out of your system after you stop using them depends on the type of birth control pill and how your individual body reacts to the pill. Some women may experience the effects of birth control pills for a longer time than others. If you do not take the birth control pill for just one day, you risk becoming pregnant. Therefore, it is possible for the birth control pills to be out of your system in one day. I recommend asking your doctor to determine the amount of time you have for the particular birth control pill to get out of your system.