In plain words
Enterohepatic circulation is the loop that moves substances from the liver into the gut and back again. The liver makes bile and releases it into the intestine. Some of it is reabsorbed and returns to the liver. In newborns, from the , called meconium, can be reabsorbed through this loop. That is one reason the first days matter for . Frequent early feeding and early stools move that bilirubin out of the body. A baby who feeds rarely, or who has few wet or dirty diapers in the first days, may have more of this returning. If your baby looks yellow, is sleepy, or is not feeding well, call your pediatrician the same day.
The deeper version
In the neonatal gut, bilirubin conjugated in the liver is excreted in bile and partly deconjugated by intestinal beta-glucuronidase, allowing the unconjugated form to be reabsorbed and returned to the hepatic pool. Meconium is a major source. Infrequent feeds and delayed passage of meconium prolong the cycle and contribute to , which is distinct from physiologic jaundice. Early and frequent feeding shortens this cycle. The AAP clinical practice guideline on (Kemper et al., 2022) recognizes feeding adequacy as a risk factor and emphasizes assessment of intake alongside bilirubin level. Evidence for specific interventions beyond feeding is limited.
Where it comes up
- Newborn jaundiceBaby Basics
- Feeding a baby with jaundiceFeeding Your Baby
- Colostrum and the first days before milk comes inFeeding Your Baby
- When your milk comes inFeeding Your Baby
What mothers here say about enterohepatic circulation
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Sources
- Kemper AR et al. — Clinical practice guideline revision: management of hyperbilirubinemia in the newborn infant 35 or more weeks of gestation. Pediatrics, 2022
- Dennery PA et al. — Neonatal hyperbilirubinemia. New England Journal of Medicine, 2001