It has been shown that iron-deficient anemic infants are not as successful in tests of mental and motor development as their iron-sufficient age-matched counterparts. A recent study has confirmed that iron intervention can reverse developmental delays, while placebo-treated anemic infants showed no such improvement. The etiology of the developmental delay and its effect on later performance remain to be elucidated.
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Nancy F. Sheard (2009) studied this question.
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