You can take Ella every time you have an oopsie. We don’t recommend using it on a regular basis since other birth control methods are more effective (Implant, IUD, Pill, Ring, Patch, Shot, Condom). Using Ella can also change your menstrual cycle (generally for just 1 cycle) and if you use Ella often, that will make it harder to keep track of when you’ve missed your period. Ella should be used only for emergencies and not as a method of birth control.