Bile acid transporter expression in liver and ileum. A and B: relative mRNA expression of Na-taurocholate cotransporting polypeptide (NTCP) and bile salt export pump (BSEP) in liver tissue of term and preterm pigs at birth and on day 3. C–E: relative mRNA expression of apical sodium-dependent bile acid transporter (ASBT), ileal lipid binding protein (ILBP), organic solute transporter α (OST-α) in ileal tissue of term and preterm pigs at birth and on day 3 of life (Preterm-Birth, n = 16, Preterm-Day 3, n = 17, Term-Birth, n = 10, Term-Day 3, n = 13). Data are shown as means ± SE. *P (GA × Day) < 0.05), **P (GA × Day) < 0.01, ***P (GA × Day) < 0.001.