Analysis of the intestinal content of fetuses suggests very limited bacterial colonization with potential immunological roles, which opens new research questions.
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Collado, M.C., Segata, N. Initial exploration of in utero microbial colonization. Nat Med 26, 469–470 (2020). https://doi.org/10.1038/s41591-020-0836-1
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DOI: https://doi.org/10.1038/s41591-020-0836-1
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