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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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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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