Berseth C L
Biol Neonate. 1987;51(1):53-9. doi: 10.1159/000242631.
Ten rat pups fed pooled rat milk and 9 pups fed artificial formula had significantly heavier stomachs and intestines that contained more DNA and RNA by 40 h of age than 12 pups sacrificed at birth. Breast-milk-fed animals had significantly heavier intestines, livers and kidneys than animals fed artificial formula. The intestines of pups fed breast milk contained more DNA and RNA with a lower RNA:DNA ratio than the intestines of pups fed artificial formula. Hence, when caloric intake and mode of feeding are controlled, natural milk enhances neonatal intestinal growth more than artificial formula.
10只喂食混合大鼠乳的幼鼠和9只喂食人工配方奶的幼鼠，在40日龄时，其胃和肠道明显更重，所含DNA和RNA比12只出生时处死的幼鼠更多。母乳喂养的动物比喂食人工配方奶的动物，其肠道、肝脏和肾脏明显更重。喂食母乳的幼鼠肠道所含DNA和RNA更多，且RNA:DNA比值低于喂食人工配方奶的幼鼠。因此，当热量摄入和喂养方式得到控制时，天然乳汁比人工配方奶更能促进新生儿肠道生长。
