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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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There are more bacteria in your mouth than there are people in the world.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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.