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<< A Systematic Approach To The Evaluation Of Acute Unexplained Crying In Infants In The Emergency Department

Etiology And Epidemiology

For emergency clinicians, it is important to understand the normal or expected patterns of infant crying in order to effectively evaluate excessive or abnormal crying. In Brazelton’s 1962 study on infant crying in the primary care setting, he found that, on average, infants aged < 12 weeks cried from 1 to 4 hours each day, with a peak at 6 to 8 weeks, and an improvement by approximately 10 weeks of age.1 Other studies have similarly documented these and other expected norms of crying at various stages of infant development to guide parents and clinicians.10-12

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