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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
The human body produces and destroys 15 million blood cells every second.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
![The role of Hox genes 9–13 in specifying limb formation from the proximal to distal](https://biology-forums.com/gallery/47/medium_33_24_07_11_10_22_01.jpeg)
![Ileal conduit; A, ureters implanted into ileal segment; B, closure of proximal end of ileal conduit.](https://biology-forums.com/gallery/47/medium_18099_24_10_12_3_58_46.jpeg)