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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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If you could remove all of your skin, it would weigh up to 5 pounds.