The timing of a child's first unsupported step varies widely, typically between 8 to 24 months, and previous studies mainly focused on environmental factors. Recent research involving over 70,000 infants has revealed that genetics plays a substantial role, accounting for about 25% of the differences in walking onset. Specific genes expressed in the brain also influence motor development and are linked to later outcomes such as ADHD. This study underscores the importance of genetic factors in developmental milestones and their broader implications.
After analyzing data from over 70,000 infants, we found genetic factors account for a quarter of the variability in when babies walk unaided.
Our findings indicate that genes involved in walking onset are not only crucial for mobility but also impact future developmental outcomes, including ADHD.
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