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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.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.
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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