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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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The horizontal fraction bar was introduced by the Arabs.

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