A new study suggests that human egg cells may be protected against certain age-driven changes seen across the rest of the body.
The work, published Aug. 6 in the journal Science Advances, didn't explore how that protection works, but it did highlight a stark difference between the mitochondria — cellular powerhouses — found in adult women's blood and saliva and those carried in their eggs. Mitochondria carry their own special DNA, and as the body ages, that DNA mutates. But there seems to be an exception to this rule within the mitochondria in human egg cells.
