Purpose: Understanding the role of nutrition in the development of children's physical, mental, and motor abilities. Materials/methods: Examination of visiting nurse reports on feeding habits and perceived developmental delays in infants at 1 year of age between 2010 and 2015. Results: Between 0 and 6 months of age the lowest number of new cases (4.4/100,000) identified by health screenings can be anticipated among the infants feeding exclusively with breastmilk. We find a similarly low number of identifiable new cases among infants nourished with breastmilk where it is mixed with other nutrients (4.7 new cases) while the most cases of delayed motor development can be anticipated among infants nourished with infant formulae (48.4 new cases). Conclusions: The role of nutrition in infants? motor development is vital, especially breastfeeding. Regular health status checks of infants are inevitably required for the adoption of higher-level health-policy decisions which may induce projects, programmes, and strategies aimed at the improvement of health. Thorough documentation and continuous collection of the pertinent data is likewise requisite. Kulcsszavak: infant nutrition, motor development, parent questionnaires, layer-specific frequency, visiting health consultant