ASPEN Certified Nutrition Support Clinician (CNSC) Practice Exam

Regurgitation in children usually resolves around which age range due to maturation of the lower esophageal sphincter?

Around 2-3 months Around 7-12 months After 2 years During adolescence

Correct Answer:

Around 7-12 months

Explanation:

Regurgitation in infancy is largely due to an immature lower esophageal sphincter that doesn’t yet form a strong barrier to stomach contents. As the child grows, the LES gains tone and coordination, gradually reducing reflux. This maturation typically occurs during the latter half of the first year, so regurgitation usually resolves by about seven to twelve months. Early in infancy (around 2–3 months) the LES is still immature, and persistence beyond infancy (after two years or during adolescence) would be less consistent with normal maturation.

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