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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

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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.

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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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