Genetic Factors Play a Key Role in When Babies Take Their First Steps

Recent research from the University of Surrey has shed light on the genetic influences that determine when infants begin to walk. This groundbreaking study, the first of its kind, analyzed genetic data from over 70,000 babies and identified 11 genetic markers that impact the onset of walking, providing multiple avenues for future biological research.

Published in the journal Nature Human Behaviour, the study revealed that genetics explain approximately 25% of the variability in the age at which children take their first steps. While environmental factors have long been known to influence this milestone, these findings highlight the significant genetic contribution, similar to traits like height.

Professor Angelica Ronald, a lead researcher, explained that most children walk between 8 and 24 months, making this a broad developmental window. The milestone signifies a major transition in a child's growth. Dr. Anna Gui, another contributor, emphasized that understanding the genetic basis can alleviate parental concerns about early or late walking, as genetics play a substantial role.

The research also uncovered links between the genes influencing walking timing and brain development, including characteristics like cortical folding. Interestingly, later walking within the normal range was associated with a lower likelihood of developing ADHD, and some genes involved were also connected to higher educational achievement.

Professor Ronald expressed optimism that these genetic insights could lead to better support for children with motor or learning difficulties and enhance our understanding of child development. She noted that while a slight delay in walking can be normal, it's important for parents to consult healthcare providers if concerned.

This study emphasizes that early walking is part of a complex interplay between genetics and environment, advancing our comprehension of human growth.

Source: https://medicalxpress.com/news/2025-05-scientists-genes-babies.html