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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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Northampton, Suffolk County, New York

... 45 to 64, and 9.8% who are 65 years of age or older. The median age is 34 years. For every 100 females there are 91.0 males. For every 100 females age 18 and over, there ...