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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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There are 60,000 miles of blood vessels in every adult human.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.