Normal gross motor development: the influences of race, sex and socio-economic status.


The ages at attainment of 12 gross motor milestones were obtained prospectively during well-baby visits in the first two years of life for 381 children. All had been born at term and were judged to be normal at one year. A longitudinal analysis, using an index summarizing each child's progress for eight selected milestones, is reported for the 284 children… (More)


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