12-year-old boy sexual precocious what performance

12-year-old boys precocious performance has testicular enlargement, penis growth and thickening, pubic hair growth, beard and body hair growth, voice changes, etc.

1. testicular enlargement

One of the most obvious signs of precocious boys is the rapid enlargement of the testis, which is the primary signal of male reproductive organ development.

2. penis growth and thickening

As the testis develops, the penis will also grow thicker and thicker, gradually showing the characteristics of adult men.

3. pubic hair growth

pubic hair begins to appear and gradually dense, which is the result of skin hair follicle development under the action of puberty hormones.

4. beard and body hair growth

Although this may not be common at 12 years old, some precocious boys may grow beard and other parts of the body hair in advance.

5. voice changes vocal

cords thickened, resulting in a gradual lowering of the voice, is a significant sign of puberty.