what age is adolescent years
While each male adolescent is different, the following are average ages when puberty changes may occur: Beginning of puberty: 9.5 to 14 years old. First pubertal change: enlargement of the testicles. Penis enlargement: begins approximately one year after the testicles begin enlarging. Appearance of pubic hair: 13.5 years old. Nocturnal emissions (or wet dreams): 14 years old. Hair under the arms and on the face, voice change, and acne: 15 years old. Girls also experience puberty as a sequence of events, but their pubertal changes usually begin before boys of the same age.