Executive Summary of “Sexuality and Gender: Findings from the Biological, Psychological, and Social Sciences”
● The hypothesis that gender identity is an innate, fixed property of human beings that is independent of biological sex — that a person might be “a man trapped in a woman’s body” or “a woman trapped in a man’s body” — is not supported by scientific evidence.
● According to a recent estimate, about 0.6% of U.S. adults identify as a gender that does not correspond to their biological sex.
● Studies comparing the brain structures of transgender and non-transgender individuals have demonstrated weak correlations between brain structure and cross-gender identification. These correlations do not provide any evidence for a neurobiological basis for cross-gender identification.
● Compared to the general population, adults who have undergone sex-reassignment surgery continue to have a higher risk of experiencing poor mental health outcomes. One study found that, compared to controls, sex-reassigned individuals were about 5 times more likely to attempt suicide and about 19 times more likely to die by suicide.
● Children are a special case when addressing transgender issues. Only a minority of children who experience cross-gender identification will continue to do so into adolescence or adulthood.
● There is little scientific evidence for the therapeutic value of interventions that delay puberty or modify the secondary sex characteristics of adolescents, although some children may have improved psychological well-being if they are encouraged and supported in their cross-gender identification. There is no evidence that all children who express gender-atypical thoughts or behavior should be encouraged to become transgender.