MICROBIOTIC bacteria that colonizes the human body, starting through the skin, vagina and intestines, organs connected to the outside world. Although they already exist during fetal development, their territorial conquest begins in childbirth, and forming different groups of bacteria if the birth was normal or cesarean section. There are 39 trillion microbiotics in a human being. The autochthonous microbiota stabilizes at two years. They provide us with a number of advantages such as protection against invasion by pathogens and the development of the immune system, collaboration in the digestion of dietary components and provision of vitamins and other essential nutrients.