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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Cyanide works by making the human body unable to use oxygen.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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The horizontal fraction bar was introduced by the Arabs.