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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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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.