Stem Cell Research.

Stem cells are the primary cells that can be trained to develop into any human cell tissue eg (muscle, skin, brain, etc.) However, in embryonic stem cell research, to retrieve stem cells from embryos requires a process called therapeutic cloning where a person's DNA is put into an unfertilised human egg (effectively cloning a person), the embryo is then grown for a few days before it is destroyed, producing stem cells identical to the donor …

…be overcome. Only significant human advances throughout the world have been made on adult stem cells. For example, In the US, a paraplegic woman with a severed spinal cord has been treated with her own immune cells and regained bladder control and movement of her toes. Scientists have turned human pancreatic ductal cells into cells that produce insulin, providing hope for diabetics. Severe heart damage and Parkinson's disease benefits appear promising with adult stem cells.