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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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.