Gut flora, or intestinal microbiota, is the term for all microorganisms that settle in the intestine. In babies, the gut flora must first settle and develop. Various studies indicate that the colonization of the intestine already begins in the womb. An infant’s gut flora changes with time. Healthy intestinal flora is an important basis for general health. Thus good intestinal bacteria (such as bifidobacteria, lactobacilli) are important for fighting off pathogenic bacteria. This way, infections can be avoided. In addition, the gut flora supports the development of the immune system, which is still immature at birth.