Medical Moment for February 2023

From Science News

Embryos Appear to Reverse Their Biological Clock Early in Development

By Erin Garcia de Jesús

As people age, so do all of our cells, which accumulate damage over time. But why our offspring don’t inherit those changes — effectively aging a child even before birth — has been a mystery. “When you are born, you don’t inherit your parents’ age,” says Yukiko Yamashita, a developmental biologist at MIT who studies the immortality of germline cells such as eggs or sperm. “For some reason, you are at zero.”

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