The study found that babies born at 42 weeks’ gestation or later were twice as likely to have parent-reported ADHD symptoms as babies born at term (37 weeks).
According to the authors, “Our results suggest that children born post-term have a neurodevelopmental delay. However, further research is needed to demonstrate a causal relation.”
The authors suggested a few possible explanations, including post-term babies are more likely to be bigger than those born at term and thus at a greater risk of oxygen deprivation during delivery, a condition some believe is associated with behavior problems.