Each person’s deeply felt internal and individual experience of gender, which may or may not correspond to the sex assigned at birth, including the personal sense of the body (which may involve, if freely chosen, modification of bodily appearance or function by medical, surgical or other means) and other expressions of gender, including dress, speech and mannerisms.
… However, other factors may also be at play, including gender differences in behaviour that affects health, such as … menopause or to align their physical appearance with their genderidentity. Clinical trials for new vaccines must include a …