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Pearl Index

The Pearl Index is the value used in the medical sciences to rate the effectiveness of a birth control method. It refers to the number of unwanted pregnancies in 100 couples using any given method for the duration of one year.

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Flapper

... to be seen smoking or drinking in public. Flappers had their origins in the Gibson girls[?] of the 1890s. Named for the drawings of Charles Dana Gibson[?], these women ...