biostudies-literatureUnknown47Choo S<h4>Objectives</h4>Understanding the experiences of transgender and non-binary (TGNB) individuals from a life-course perspective is essential. This article aims to identify ages at key milestones related to transgender identity and assess experiences of stigmatization among TGNB individuals across different life stages.<h4>Methods</h4>We analyzed data from a nationwide longitudinal survey of 585 TGNB adults in Korea collected in 2020 and 2021. Analysis of variance and chi-square test were used to compare mean ages at transgender identity developmental milestones and experiences of anti-transgender stigma across transgender identities.<h4>Results</h4>On average, TGNB Koreans realized their transgender identity at age 13, accepted it at age 20, and came out to others at age 21. Regarding expEpidemiology and healthe2025032https://www.ebi.ac.uk/biostudies/studies/S-EPMC12425868biostudies-literatureBeing trans in Korea: key milestones and stigmatization across life stages in a nationwide survey of 585 transgender and non-binary young adults.PMC12425868Yi HKim RKim SSChoo SLee HfalseBeing trans in Korea: key milestones and stigmatization across life stages in a nationwide survey of 585 transgender and non-binary young adults.<h4>Objectives</h4>Understanding the experiences of transgender and non-binary (TGNB) individuals from a life-course perspective is essential. This article aims to identify ages at key milestones related to transgender identity and assess experiences of stigmatization among TGNB individuals across different life stages.<h4>Methods</h4>We analyzed data from a nationwide longitudinal survey of 585 TGNB adults in Korea collected in 2020 and 2021. Analysis of variance and chi-square test were used to compare mean ages at transgender identity developmental milestones and experiences of anti-transgender stigma across transgender identities.<h4>Results</h4>On average, TGNB Koreans realized their transgender identity at age 13, accepted it at age 20, and came out to others at age 21. Regarding exp2025-01-01T00:00:00Z20252026-06-01T12:09:45.939Z2026-04-08T12:04:17.594ZS-EPMC124258684061001110.4178/epih.e2025032