Table 1.

Demographics of four mother–infant pairs sampled for feed (formula or human milk), gastric, and intestinal contents.

Demographics	Infants†
Gestational age at birth, weeks	32.08 ± 4.48 (27.1–38)
Postnatal age at feeding, days	41.50 ± 22.93 (23–75)
Corrected gestational age at feeding, weeks	38.00 ± 2.31 (36.4–41.3)
Body weight at sampling, kg	2.87 ± 0.53 (2.45–3.63)
Length at sampling, cm	46.25 ± 3.77 (42–51)
Head circumference at sampling, cm	35.50 ± 3.54 (31–39.5)
Total kilocalories intake, kcal/kg/day	131.25 ± 25.40 (108–165)
Specific feed volume, mL	43.50 ± 12.23 (30–57)

^†Values are mean ± SD (range).