contraceptive efficacy

Contraceptive efficacy refers to how effective a birth control method is at preventing pregnancy. It’s usually measured as a percentage, indicating how many women out of 100 will become pregnant within a year of using that method correctly. For example, an efficacy of 99% means that only 1 out of 100 women will get pregnant in a year with perfect use. Different methods have varying levels of efficacy—some, like IUDs and implants, are highly effective, while others, like condoms or fertility awareness, may have lower effectiveness, especially if not used correctly or consistently.