Polycystic Ovary Syndrome (PCOS) is an endocrinological condition affecting up to 18% of reproductive-age women1. Diagnosis requires two or more of the following: (1) menstrual irregularity, (2) hyperandrogenism (excess male hormones) and (3) polycystic ovaries1. Additionally, women with PCOS have higher rates of cardiovascular disease (CVD) risk factors, and, potentially, CVD events1. Given that some PCOS symptoms are specifically pre-menopausal, it is important to understand the CVD risk associated with PCOS across the lifespan. To address this, we conducted a nationwide registry study.