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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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On average, the stomach produces 2 L of hydrochloric acid per day.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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