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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.