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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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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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Excessive alcohol use costs the country approximately $235 billion every year.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.