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Family Health International (FHI) conducts biomedical and acceptability research on emergency contraception in collaboration with national and international organizations around the world. Emergency contraception can prevent pregnancy after unprotected intercourse, method failure, or incorrect method use. The most widely used emergency contraceptives are regimens of birth control pills that use the same hormonal ingredients found in regular oral contraceptives but in higher doses. Emergency contraceptive pills do not affect a fertilized egg that has been implanted in the uterus and, hence, cannot cause an abortion. The pills should be started as soon as possible after unprotected intercourse, ideally no later than 72 hours.
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