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Pregnancy leaves microchimerism, science discussions resurface

Original: # ICYMI : If you've ever been pregnant, you're a chimera. I've known this for several years. But what this article taugh

A renewed science explainer points out that pregnancy can make people biological chimeras: fetal cells cross into the mother's body and may persist for decades. Readers are reacting to the detail that even an early miscarriage, such as one more than twenty years ago, could leave behind embryonic genetic material that might even be passed on later. The finding is prompting people to share their own surprise at how long fetal cells can remain.

Why now: A science article about fetal microchimerism surprised readers by showing pregnancy effects can persist for decades.

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• # ICYMI : If you've ever been pregnant, you're a chimera. I've known this for several years. But what this article taught me is that even though I miscarried at 6 weeks more than 20 years ago, I might still harbor that embryo's genetic material -- and might have passed it to my… · courtcan · 20

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