Crying in infancy.

@article{Brazelton1962CryingII,
  title={Crying in infancy.},
  author={T. Berry Brazelton},
  journal={Pediatrics},
  year={1962},
  volume={29},
  pages={
          579-88
        }
}
Eighty mothers of normal newborn infants kept daily records of their infants' fussing for the first 12 weeks. Twenty-eight babies were the firstborn in the family. An attempt was made to eliminate excessive environmental tension as an additive factor. Babies with underlying pathology were eliminated also. There was an average of 2¼ hours' crying in the first 7 weeks, with less each week thereafter. The time of day of its occurrence is summarized. Typical non-fussers sucked their fingers for… 

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