Gender identity
When a child is born, the birth sex of the child is determined by the body parts with which the child is born. This determines the biological sex of the child. However, the biological sex of a person is not the gender of the person. The biological sex is rather the socially constructed characteristics of women and men, which essentially comprises of such as norms, roles, and relationships that exists between groups of women and men. A person might perceive the self as male, female, both, gender queer, or neither and this is what constitute their gender identity. When for a certain person, sense of personal identity and gender correspond with their birth sex they are called the cisgender, while those whose personal identity do not match with that of their birth sex are called transgender. Gender identity is a very complex and contradictory concepts that is studied by the social scientists.