The following is a summary of the “Developmental predictors of young adult borderline personality disorder: a prospective, longitudinal study of females with and without childhood ADHD,” published in the February 2022 issue of Psychiatry by O’Grady, et al. Among the many risk factors for developing borderline personality disorder (BPD) in childhood and adolescence, impulsivity and trauma stand out. Yet, there have been scant prospective longitudinal investigations of BPD’s causes and progression, much less those that took into account numerous risk factors simultaneously.