Where does the microbiome in our bodies come from?
The fetus is sterile in the womb, meaning there are no bacteria in the fetus' body.
When a baby is born, the first gift the mother gives to the baby is a healthy microbiome (lactobacilli), but this gift is not available to every baby.
Only babies born through vaginal delivery acquire the bacteria Lactobacillus from the mother's vagina. Once a baby gains these bacteria, it can develop its commensal flora, leading to a healthier body later in life.
However, babies born by cesarean section lack commensal bacterial strains because they are dominated by opportunistic bacteria, such as enterococcus, which circulate in hospitals. They are at increased risk of asthma and obesity later in life.
The microbiota in the baby's body will change over time, including breastfeeding methods and living environment. For example, babies who live in households with pets or siblings may be exposed to more microorganisms, which is beneficial for developing their immune systems.
And I was born through vaginal delivery, and so far, I haven’t had any major illnesses✌🏻.
