Children learn their native language, religious, political, ethnic and racial attitudes and beliefs in their early years in their families of origin. What do children learn about gender and diversity, conflict and change, from interactions with their parents, siblings, and extended families? Is gender euphoria/dysphoria, in part, learned at home?
. . . is evident at birth, enlarges at puberty, and continues into maturity. The perception of sex is mainly a function of sexual dimorphism. The attribution of gender is based on perceived sex, i.e., body features (plus, cultural cues, hairstyle, clothing, cosmetics, and behavior) . . .
Several answers . . . http://www.originalplumbing.com/index.php/the-basics/video/item/880-wtf-is-gender