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The effect of exclusive breastfeeding on development and incidence of infection in infants.

Of 145 normal fullterm infants studied during the first year after birth, those exclusively breastfed for the first four months differed significantly from those not exclusively breastfed in physical and behavioral development, and resistance to infection. At four months of age, the mean weight of the exclusively breastfed group was higher (p < 0.05). At one year, the exclusively breastfed group showed more advanced. Personal-Social (p = 0.05) and gross Motor development (p < 0.05) on the Denver Developmental Screening TEst, and lesser cumulative incidence of infectious diseases (p < 0.05). This study demonstrated the beneficial effects of breastfeeding on development and resistance to infection in infants.