Adolescence -

Development of primary and secondary sex characteristics, including breast development and menstruation in girls, and testicular/penis growth and voice deepening in boys.

Rapid increases in height and weight; girls typically start around ages 10–12, while boys follow about two years later. adolescence

Adolescence is the transformative phase of development between childhood and adulthood, typically occurring from ages 10 to 19 or into the mid-20s. It is defined by rapid physical, cognitive, and social changes as individuals transition toward independence. Physical Features (Puberty) girls typically start around ages 10–12