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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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In 1864, the first barbiturate (barbituric acid) was synthesized.