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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.