[Prospective study of the prevalence of iron deficiency in breast-fed infants in Cantabria, its relation to the introduction of cow's milk and psychomotor development].

A prospective study was carried out on the prevalence of iron deficiency and/or iron deficiency anaemia in 196 healthy infants aged between eleven and fifteen months. The results are as follows: iron deficiency and/or iron deficiency anaemia; 46.4%, isolated iron deficiency 37.7% and iron deficiency anaemia, 8.7%. Significant differences were not found in relation with the age to the introduction of natural cow milk. No delays were found in psychomotor development (using Denver's test) related to anaemia or iron deficiency.