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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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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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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

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