Table 2.

Literature Review Inclusion and Exclusion Criteria.

Study Characteristics	Inclusion Criteria	Exclusion Criteria
Study design	Any research-based evidence	Low evidence-based studies
Population	Adult patients requesting GAS	Animals, patients without need of GAS, adolescents
Interventions	Transgender Voice and Communication, Feminizing Chest surgery (Breast augmentation with or without Mastopexy), Masculinizing Chest Surgery (Bilateral Mastectomy), Penile Inversion Vaginoplasty, MtF Bottom Surgeries, Colon Vaginoplasty, Orchiectomy, FtM Bottom Surgeries, Metoidioplasty, Phalloplasty, Hysterectomy, Estrogen, Testosterone, GnRH, FFS,Facial Masculinizing Procedures	None
Outcomes	Successful transition (gender congruence achieved)	Unsuccessful transition (gender congruence not achieved)
Language	English	Non-English