Primate species have been notoriously resistant to attempts at cloning
, Greely said.
Dolly's existence opened the door for speculation about the possibility of human cloning, would this new technology result in unscrupulous attempts at cloning
for human reproduction, perhaps in an attempt to create designer babies?
All attempts at cloning
were largely unsuccessful until 1984.
We have become very proficient at cloning
cells, producing embryos and initiating pregnancies.
There, before a panel considering whether to recommend a ban on human cloning, more than a dozen scientists described their successes and failures at cloning
mice, sheep, goats, and cows.
Many of the scientists invited to testify detailed the low success rates they've had at cloning
animals and described deformities and other physical problems experienced by the few clones that do survive to birth.