**5.2 Mode of birth**

Mode of birth has an important influence on gut microbiome composition [12, 16]. With vaginal delivery, infants are colonized by maternal vaginal bacteria (dominated by *Lactobacillus* and *Prevotella* genera) while following C-section delivery, infants are colonized by maternal skin bacteria (dominated by *Staphylococcus*, *Corynebacterium*, and *Propionibacterium* genera).
