Adolescent

Adolescence is typically divided into three distinct sub-phases, each with unique milestones:

Approximately 1.3 billion people—roughly one in six people worldwide—are adolescents. adolescent

Major causes of death and injury include road accidents, suicide, and interpersonal violence. Stages of Development adolescent

Generally 10–19 years, though developmental changes continue until approximately 24–25 years. adolescent

The onset of puberty, which triggers rapid physical and hormonal changes.