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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.