Girl: definition, development, and social context

Biological and developmental characteristics

Biologically, girls share the early growth pattern of children and usually begin the transition to adult bodies during puberty. Puberty commonly begins in late childhood or early adolescence and involves hormonal changes that lead to reproductive maturity. Until that transition they are referred to as a child or, in the later stage, a teenager.

• Typical physical changes include growth spurts, development of secondary sexual characteristics and the start of menstrual cycles.
• Emotional and cognitive development continues through adolescence, influenced by biology, family and environment.

History, language and legal status

The words and categories used for young females have evolved across languages and societies. Legal systems set ages for consent, work, and majority, which affect when a girl is considered an adult or gains specific rights. Many societies mark the passage from girlhood to adulthood with cultural rites or ceremonies.

Social roles, education and health

Girls’ experiences vary widely: access to education, healthcare, and safety shape opportunities and outcomes. Key health topics include adolescent medicine, menstrual care and mental health. Social expectations and gender norms influence schooling, family roles and career choices.

• Education and protection from violence are central to policy efforts worldwide.
• Reproductive health and accurate information support healthy transitions.

Terminology and important distinctions

Common distinctions clarify usage: girl vs woman (youth versus adult), and girl vs boy (female versus male children). The term may also intersect with gender identity: some people who are transgender identify as girls. For many practical and legal purposes, societies define age thresholds, but humane and inclusive practice recognizes individual development.

For further reading, consult general reference sources on human development, adolescent health and gender terminology. See entries on woman, menstruation and periods and broader articles on childhood and adolescence for context.