Stem cell find offers hope for infertility

An experiment that produced human eggs from stem cells could one day be a boon for women who are desperate to have a baby, according to a study published yesterday.

The work sweeps away the belief that a woman has only a limited stock of eggs and replaces it with the theory that the supply is continuously replenished from precursor cells in the ovary, its authors said.

If the report is confirmed, harnessing those stem cells might one day lead to better treatments for women left infertile because of disease — or simply because they’re getting older.