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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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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.