RESUMEN
Doulas, or birth coaches, are said to be "changing the world, one birth at a time." Black doulas have been suggested to mitigate against lack of representation in obstetric care, limited identity acknowledgement and accommodation, and obstetric racism. However, scientific inquiry into the specific communication strategies and messages used by Black doulas to advocate for clients was non-existent in extant literature. Guided by the Agency-Identity Model, we analyzed 20 diary-interviews of nine Black doulas who recently served Black clients. Specifically, we explored Black doulas' communication strategies and whether these strategies had an impact on client agency. We found that Black doulas prepare their clients for patient-provider interactions, including conversations about certain medical treatments and procedures and the risks for Black women and birthing people, the importance of informed consent, how to be heard, and how to resist neglect or abuse. We found that, in turn, most Black clients were able to enact agentic responses. We describe the specific doula messages, and contextualize our findings, considering how these collective interpersonal communication strategies of Black doulas, and their clients' agentic transformations, may index a sociopolitical movement to reframe the experience of childbirth in America.