Birth control method

特許 係属中 Birth control methods include barrier methods, hormonal birth control, intrauterine devices (IUDs), sterilization, and behavioral methods. They are used before or during sex while emergency contraceptives are effective for up to a few days after sex. Effectiveness is generally expressed as the percentage of women who become pregnant using a given method during the first year[23] and sometimes as a lifetime failure rate among methods with high effectiveness, such as tubal ligation.