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I think in this metaphor the placenta is actually on the fetus' side and also had the baby's DNA.

• Ygg2 1y ago
  Did you read the article? It's not. It's somewhat fighting against it. Plus immune system would see baby's DNA as corrupted, since half of it is just wrong.
  • thaumasiotes 1y ago
    > Plus immune system would see baby's DNA as corrupted The immune system can't see DNA at all. It works by other methods.
    • Ygg2 1y ago
      True but it can detect DNA isn't the same by comparing expressed proteins.