Understanding why ADHD happens can feel like chasing a moving target. This study adds a biological angle most people haven't considered. We discuss a prospective study examining whether maternal inflammation during the second trimester is associated with ADHD symptoms in children later in life. Researchers measured cytokine levels in 62 pregnant women and followed up on ADHD symptoms in 68 children using teacher and parent reports. The study suggests there is an association between those infl...