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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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There are approximately 3 million unintended pregnancies in the United States each year.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.