How does the immune system prepare for breastfeeding?
Peer-Reviewed Publication
Updates every hour. Last Updated: 14-Aug-2025 20:11 ET (15-Aug-2025 00:11 GMT/UTC)
Salk immunologists discovered that specialized immune cells called T cells increase in mammary glands during late pregnancy and breastfeeding, and that some of the T cells relocate from the gut—suggesting a connection between the gut microbiome and breastfeeding. The findings may help explain the advantages of breastfeeding, prompt solutions for mothers unable to breastfeed, help design better formulas, and inform dietary decisions that enhance breast milk production and quality.
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