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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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 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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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.