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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.
Asthma cases in Americans are about 75% higher today than they were in 1980.
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.
People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.