Focuses on rapid physical growth and the beginning of puberty. Teens at this stage often become more self-conscious about their appearance and seek greater privacy.
Adolescence is typically divided into three distinct sub-phases, each with unique milestones: adolescent
The onset of puberty, which triggers rapid physical and hormonal changes. Focuses on rapid physical growth and the beginning
Approximately 1.3 billion people—roughly one in six people worldwide—are adolescents. Approximately 1
Generally 10–19 years, though developmental changes continue until approximately 24–25 years.
Adolescence is the unique developmental bridge between childhood and adulthood, traditionally spanning the ages of 10 to 19, though newer definitions often extend into the mid-20s. It is characterized by profound transitions in biological, cognitive, and psychosocial domains as individuals begin to discover their identity and prepare for adult roles. This period is marked by high neuroplasticity, making it a time of both extreme vulnerability to mental health issues and significant opportunity for positive growth and resilience. Quick Facts