section_path: Gender as biopsychosocial
section_name: Gender as biopsychosocial
paragraph_text: Gender as biopsychosocial
  
  According to Alex Iantaffi, Meg-John Barker, and others, gender is biopsychosocial. This is because it is derived from biological, psychological, and social factors, with all three factors feeding back into each other to form a person's gender.
  
  Biological factors such as sex chromosomes, hormones, and anatomy play a significant role in the development of gender. Hormones such as testosterone and estrogen also play a crucial role in shaping gender identity and expression. Anatomy, including genitalia and reproductive organs, can also influence one's gender identity and expression.
  
  Psychological factors such as cognition, personality, and self-concept also contribute to gender development. Gender identity emerges around the age of two to three years. Gender expression, which refers to the outward manifestation of gender, is influenced by cultural norms, personal preferences, and individual differences in personality.
  
  Social factors such as culture, socialization, and institutional practices shape gender identity and expression.
  
  In some English literature, there is also a trichotomy between biological sex, psychological gender, and social gender role. This framework first appeared in a feminist paper on transsexualism in 1978.