meRfi®-GM
The Digital Textbook on Gut Microbiota and Beyond

Infant Formulas contain only traces of oligosaccharides, leading to microbiome differences between breastfed and formula-fed infants. Bovine milk oligosaccharides (BMOs) are a rich source of sialylated oligosaccharides, especially 3'-sialyl lactose (3'-SL) and 6'-sialyl lactose (6'-SL).
Ten Bruggencate et al. 2014 Nutr. Rev. 72: 377-389

The addition of prebiotics to infant formulas is associated with the change in the profile of the gut microbiota compared to infants fed milk formulas without prebiotics
de Morais et al. 2006 J Pediatr (Rio J) 82: S189–97

see also:
Breastfeeding…