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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.