IntroductionBirth during the 3 month period ending in August has been associated with increased risk of attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD), especially in regions where the school year starts in September. Nevertheless, few studies have either examined these factors in Japan, where the academic year starts in April, or investigated the role of weather conditions at birth.MethodsWe enrolled 317 healthy adults from a population of medical students….
