性同一性
Gender identity is crucial in the development of a young individual as it is a big part of their personal social identity. The confusion and questioning involved in one's formation of gender identity can be influenced by the need to fit into gender binaries or adhere to social ideals constructed by mainstream society. The assigned sex of a person at birth, otherwise known as natal sex, is not always interchangeable with the terms "gender identity" and "gender role". Natal sex and gender identity are, however, different components of identity, and gender identity does not necessarily unfold in the direction of one's natal sex. Gender identity is not the same as gender role; gender identity is a core sense of self, whereas gender role involves the adaptation of socially constructed markers (clothing, mannerism, behaviours) traditionally thought of as masculine and feminine. Natal sex, gender identity, and gender role interact in complex ways and each of these is also separate from the direction of one's sexual attraction. The social constructs of masculinity and femininity may also play as a factor in causing confusion for youths; it may impact the way they feel they have to behave if they identify with certain gender identities or sexual orientations.