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特許 係属中 Birth control, also known as contraception and fertility control, are methods or devices used to prevent pregnancy.[1] Planning, provision and use of birth control is called family planning.[2][3] Birth control methods have been used since ancient times, but effective and safe methods only became available in the 20th century.[4] Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable.
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