Poverty can affect babies' motor development as early as six months of age. This is the conclusion of the first Brazilian study to examine the quantity and quality of motor development month by month and its relationship with socioeconomic vulnerability during the first months of life. The study, conducted by researchers at the Federal University of São Carlos (UFSCar) in the state of São Paulo, followed 88 babies from three to eight months of age. Fifty of the babies were from families experiencing socioeconomic vulnerability. The results were published in the journal Acta Psychologica.