The effectiveness of progestin-only methods varies:
Progestin-Only Pills: With typical use, the failure rate is about 9% per year. Injectable Contraceptives: Less than 1% failure rate with perfect use, but around 6% with typical use. Hormonal IUDs: Less than 1% failure rate, making it one of the most effective methods. Contraceptive Implants: Less than 1% failure rate, similar to the hormonal IUD.
