Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The human body produces and destroys 15 million blood cells every second.
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Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.