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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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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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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Asthma cases in Americans are about 75% higher today than they were in 1980.