Objective: The aim of this review was to explore the impact of living with undiagnosed ADHD and adult diagnosis on women. Method: A systematic literature search was completed using three databases. Eight articles were considered relevant based on strict inclusion criteria. Thematic analysis was used to analyze the results of the articles. Results: Four key themes emerged: Impacts on social-emotional wellbeing, Difficult relationships, Lack of control, and Self-acceptance after diagnosis. Conclusion: This knowledge can be used to advance the understanding of ADHD in adult women and the implications for late diagnosis in women.