Background information: A newborn’s gut microbiota is inherited from his/her mother, and is also passed long via vaginal, but not Caesarian birth. Gut microbiota affects not only GI health, but psychoemotional health, metabolism, endocrine, immune function, and stress response.
Have you seen any research regarding how long post partum you can do the vaginal swab? I can’t remember where I hear that but that they can do it at birth for Caesarian babies – I assumed they swipe it on their nose? I know there’s a critical window for establishing microbiome but don’t know much about it 🙂
The window is extended for gut microbiota transfer if mama breastfeeds, even if she had a C-section. See this immunomodulation article about dietary fats (hence, breastmilk discussion) on my website: (these are not the end all be all citations, but they provide some foundational information and can get you started). I like Joe’s article (the first one).
How Your Health Ultimately Depends on Your Gut – Nutrient Signaling: Evolutionary Origins of the Immune-Modulating Effects of Dietary Fat, Jo Alcock MD et al
Love talking about this stuff! 🙂 Hope this helps,