| C-section | Caesarean section |
| DNA | Deoxyribonucleic acid |
| GI | Gastrointestinal |
| HMO | Human milk oligosaccharides |
| IndVal index | Indicator value index |
| IAP | Intrapartum antimicrobial prophylaxis |
| IBD | Inflammatory bowel disease |
| MDR | Multi-drug resistant |
| NICU | Neonatal Intensive Care Unit |
| RNA | Ribonucleic acid |
| SCFA | Short chain fatty acids |