During utero a babies gut is sterile. They get their first exposure to bacteria when they pass through the birth canal. The mothers microbiome becomes the babies. The unfortunate part about this is that many mothers unknowingly have a gut imbalance that they pass onto their child during birth. Or if the baby is born via cesarean section, their first exposure is environmental.

Colic is one of the first signs that the baby contracted an imbalanced gut during birth.