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even after a single sexual encounter.

Methods of contraception—including condoms, birth-control pills, implants, intrauterine devices, injections, and others—vary in effectiveness and suitability.

Some methods also protect against pregnancy but do not protect against STIs.

That’s why combining contraception with STI prevention may be appropriate for many sexually active people.

4. Emergency Contraception Exists
   If unprotected sex occurs and pregnancy isn’t desired, emergency contraception may be an option.

Different emergency-contraception methods have different time windows and eligibility considerations.

Some pills work best when taken as soon as possible, while certain intrauterine devices can also be used as emergency contraception.

Emergency contraception does