Filler Use Among Trans Women: Correlates of Feminizing Subcutaneous Injections and Their Health Consequences.

Subcutaneous injections, or "fillers," are used illicitly and in large quantities by trans women for feminization. They are associated with severe complications, but data on their use are limited, especially in places with widespread access to safe gender-affirming care. Our analysis seeks to assess the prevalence, correlates, and complications of filler use to inform prevention and treatment.