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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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Women are 50% to 75% more likely than men to experience an adverse drug reaction.

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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

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Blood is approximately twice as thick as water because of the cells and other components found in it.

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