Individuals may communicate their gender identity to others in a variety of ways, all of which fall under the banner of gender expression. The mannerisms people adopt, the clothes they wear, and the way they cut their hair are all examples of gender expression.
More About Gender Identity
Academics suggest that a person's gender identity is typically formed between 18 months and three years of age. Social interactions, parental influences, culture, and an individual's own perceptions help form their gender identity. Once established, gender identity does not typically change. However, it will become more developed over time. For example, a three-year-old will likely identify as either a boy or a girl, but not completely understand the implications of this until they are much older. A person's gender identity is typically strengthened through the hormonal changes that come with puberty.