FGF19 concentration in pg/mL in peripheral plasma of preterm and term pigs on d-of-age 1, 5, 11, and 26. Values are least square means ± SE. Means differ from respective preterm or term D1 value *P ≤ 0.01, †P ≤ 0.05. Bracket denotes significant difference in values between preterm and term groups on the same day (d1 preterm n = 11, term n = 11; d5 preterm n = 8, term n = 10; d11 preterm n = 10, term n = 12; d26 preterm n = 10, term n = 10).