Adolescence (from Latin adolescere 'to mature') is a transitional stage of physical and psychologicaldevelopment that generally occurs during the period from puberty to adulthood (typically corresponding to the age of majority).[1][2] Adolescence is usually associated with the teenage years,[3][4] but its physical, psychological or cultural expressions may begin earlier or end later. Puberty typically begins during preadolescence, particularly in females.[4][5] Physical growth (particularly in males) and cognitive development can extend past the teens. Age provides only a rough marker of adolescence, and scholars have not agreed upon a precise definition. Some definitions start as early as 10 and end as late as 30.[6][7][8] The World Health Organization definition officially designates an adolescent as someone between the ages of 10 and 19.[9]
^Dorn L. D.; Biro F. M. (2011). "Puberty and Its Measurement: A Decade in Review. [Review]". Journal of Research on Adolescence. 21 (1): 180–195. doi:10.1111/j.1532-7795.2010.00722.x. ISSN1050-8392.