10 You skip backup
If you get a contraceptive implant (Implanon) or start taking a combination pill within five days after your period starts, you don’t need backup birth control, but if you start any other time during your cycle, you need condoms or another birth control method for the first seven days.
For progestin-only pills, you need backup for the first 48 hours of use. Whatever type you choose, check with your doctor to find out if you need backup until it starts working.
