1 INTRODUCTION Pregnant and parenting women consistently have low utilisation of and retention in substance use disorder (SUD) treatment.1, 2 Women with SUD present with significant histories of trauma, with more than a third having a history of intimate partner violence inclusive of physical and sexual trauma.3 This history or ongoing experience of trauma, coupled with internalised stigma and shame related to their substance use, can exacerbate a woman's substance use and impede her ability...