There was a very interesting article in the New York Times on the micro bacteria living inside people. Among the numerous fascinating observations were the following excerpts on breast feeding, normal delivery. One can draw extensive corrollaries as applied to home births, too.
The study of babies and their specialized diet has yielded key insights into how the colonization of the gut unfolds and why it matters so much to our health. One of the earliest clues to the complexity of the microbiome came from an unexpected corner: the effort to solve a mystery about milk. For years, nutrition scientists were confounded by the presence in human breast milk of certain complex carbohydrates, called oligosaccharides, which the human infant lacks the enzymes necessary to digest. Evolutionary theory argues that every component of mother’s milk should have some value to the developing baby or natural selection would have long ago discarded it as a waste of the mother’s precious resources.It turns out the oligosaccharides are there to nourish not the baby but one particular gut bacterium called Bifidobacterium infantis, which is uniquely well-suited to break down and make use of the specific oligosaccharides present in mother’s milk. When all goes well, the bifidobacteria proliferate and dominate, helping to keep the infant healthy by crowding out less savory microbial characters before they can become established and, perhaps most important, by nurturing the integrity of the epithelium — the lining of the intestines, which plays a critical role in protecting us from infection and inflammation.
Most of the microbes that make up a baby’s gut community are acquired during birth — a microbially rich and messy process that exposes the baby to a whole suite of maternal microbes. Babies born by Caesarean, however, a comparatively sterile procedure, do not acquire their mother’s vaginal and intestinal microbes at birth. Their initial gut communities more closely resemble that of their mother’s (and father’s) skin, which is less than ideal and may account for higher rates of allergy, asthma and autoimmune problems in C-section babies: not having been seeded with the optimal assortment of microbes at birth, their immune systems may fail to develop properly.
