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There are approximately 3 million unintended pregnancies in the United States each year.
In 1864, the first barbiturate (barbituric acid) was synthesized.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
The average adult has about 21 square feet of skin.
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