Generally 10–19 years, though developmental changes continue until approximately 24–25 years.
Approximately 1.3 billion people—roughly one in six people worldwide—are adolescents. adolescent
Adolescence is typically divided into three distinct sub-phases, each with unique milestones: Generally 10–19 years
Characterized by a shift in focus toward peer groups and romantic interests. This stage often involves increased conflict with parents as the teen seeks independence. adolescent
The onset of puberty, which triggers rapid physical and hormonal changes.