Most female mammals have a finite number of egg cells and become less fertile with age, but naked mole-rats seem to be eternally fertile. Now, researchers think they've cracked how these weird mammals do it.
Naked mole-rats are among the strangest mammals on the planet. Not only do they live longer than any other rodent ‒ up to 37 years ‒ they can also have babies well into old age. Now, scientists think they’ve worked out how: The remarkable rodents’ secret is that they never run out of egg cells.
These hairless, burrowing creatures don’t experience a drop in fertility as they get older, unlike most other mammals. But until now, scientists had no idea how. Most female mammals, including mice and humans, are born with a finite reserve of egg cells, which are naturally depleted over time.
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