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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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There are more bacteria in your mouth than there are people in the world.
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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.