Purpose:The purpose of this study was to examine the role of engagement with online communities by women using medicationassisted treatment (MAT) to manage recovery f rom opioid use disorder (OUD) during pregnancy and the fi rst year after birth. Study Design and Methods: Ten participants were identifi ed through purposive sampling for this secondary data analysis as part of a larger grounded theory study about ways women using MAT for recovery from OUD meet the needs of their mother-infant dyad. Inclusion criteria included: English-speaking, 18 years of age or older, living in the United States, within the fi rst year after birth, using MAT to manage OUD, and identifi ed engaging with online communities during pregnancy and/or postpartum. A categorical-content narrative approach was used.Results: Three narratives were identifi ed from the analysis, belonging, collaboration, and expecting success. Clinical Implications: Engagement in online communities can be a meaningful adjunct or replacement for in-person support. Online spaces are available 24/7 and allow people to join a community where they will not experience stigma and can fi nd support tailored to their needs. Health care providers could extend their care for mothers affected by OUD by referring them to online communities for support of recovery self-management efforts.