Stem Cells Made From Eggs, Not Embryos

"We just don't know whether these cells will be as good as embryonic stem cells from naturally fertilized embryos."

Scientists say they've created embryonic stem cells by stimulating unfertilized eggs, a significant step toward producing transplant tissue that's genetically matched to women.

The advance suggests that someday, a woman who wants a transplant to treat a condition like diabetes or a spinal cord injury could provide eggs to a lab, which in turn could create tissue that her body wouldn't reject.

Ethicists disagreed on whether the strategy would avoid the long-standing ethical objections to creating embryonic stem cells by other means. Read more