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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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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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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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In 1864, the first barbiturate (barbituric acid) was synthesized.