UOI

Puberty Characteristics

There are two types of physical changes that occur during puberty: a) changes to primary sex characteristics and b) changes to secondary sex characteristics. Primary sex characteristics refer to changes to the sexual organs themselves . Secondary sex characteristics refer to other visible changes that mark adult maturation such as changes in height and body shape.

Primary sex characteristic changes for boys include the enlargement of the testes, penis, prostate gland, and seminal vesicles. These changes normally begin to occur between the ages of 9 and 14 years. Their growth is generally completed between ages 12 and 16 years   

.

Source:https://www.mentalhelp.net/.../primary-physical-cha..