It raises hopes that human organs could be grown for
transplant operations, but that’s a long way away, said lead researcher Carlos
Izpusua Belmont of the Salk Institute in California.
This is “just a very early step toward the goal,” he said.
The operation involved inserting three to 10 stem cells into
pig embryos, then implanting the embryos in sows.
After three to four weeks, 186 embryos were removed and
examined.
