It is the first FDA-approved clinical trial to inject fetal stem cells directly into the spinal cord of an adult.

CNN: Stem cell treatment goes from lab to operating room

The technique involves injecting genetic material from fetal pig skin cells into eggs stripped of their own genetic material.

CNN: Researchers clone pigs

Issues like cloning, stem cells, and fetal research have become part of the national lexicon.

CNN: Four decades after Roe: A legacy of law and morality

Another U.S. company, Reneuron, plans to conduct trials involving stem cells taken from fetal tissue in Britain this year.

CNN: FDA approves human embryonic stem cell study

They have shown that nerve cells taken from fetal pigs can survive and mature in the brain of a Parkinson's patient much as human grafts do.

ECONOMIST: Something new in mind