CHROMOSOMES AND HORMONES?
23rd, XX/ XY, hormones
external genitalia same, foetus develops, testosterone vs oestrogen + oxytocin
SDN, hypothalamus, 2.5 bigger in males
+ Feder and Whalen (castrated vs oestrogen, rats) but extrapolation
+ Quadango (testosterone, female rats) but Berenbaum and Bailey (CAH, questionnaire, interactionist)
+ Money (Reimer, male) but idiographic, unethical
+ Francis et al (oxytocin) but socially sensitive research
+ Van Goozen et al (MtF, aggression, visuospatial skills, opposite) but biological reductionism