The next discussion concerns the transplantation of prenatal tissues.

We use those in my field of bone marrow transplantation.

What we did is something called somatic cell nuclear transplantation.

And in transplantation, concepts shifted from whole organs to cells.

So there are going to be problems with face transplantation.

So I was privileged to train in transplantation under two great surgical pioneers

Transplantation you could take an organ out of one person, you could put it in another person, and it would work.

legally dead, definitely checked out, but is being kept alive on a respirator, so that their organs will be oxygenated for transplantation.

So I am a pediatric cancer doctor and stem cell researcher at Stanford University where my clinical focus has been bone marrow transplantation.

Mycoplasma genitalium and its slow growth about a year and a half ago, we decided to synthesize the much larger chromosome, the mycoides chromosome, knowing that we had the biology worked out on that for transplantation.

Now, as I was training in clinical medicine and hematology and oncology and stem cell transplantation, what we had instead, cascading through the regulatory network at the FDA, were these substances arsenic, thalidomide, and this chemical derivative of nitrogen mustard gas.

Last time we started out last time with some stores with some moral dilemmas about trolley cars and about doctors and healthy patients vulnerable to being victims of organ transplantation we noticed two things about the arguments we had one had to do with the way we were arguing it began with our judgments in particular cases we tried to articulate the reasons or the principles