Sexual maturity state of self-test ( BoysPart)

12-year-old boy in general about the beginning of testicular growth, 18-year-old had been close to the volume of the adult testis. Testicular development, increased volume, is the adolescent growth, development important to reflect; own hand-to-testosterone from time to time, it would be in the slowly growing up. At the same time, 13-year-old boy after the emission, the testicular interstitial cells began to secrete male hormones (testosterone), would dream of doing, often erection of the penis. With the hormone in their plasma concentration increased further development of reproductive organs mature and emerging voice turn, protruding Adam's apple, grow relatively densely beard and Ye Mao, grow hair, and other secondary sexual characteristics. Can often observe the genitalia, found that the scrotum become darker in color, size, generally in the 9-12 year-old, began to increase the scrotum, accompanied by the scrotum and red skin texture changes; 12-15 years of age, the length of the penis and the week Track, but circumference than the increase in the length of the increased ease, long penis. 15-18 years old, the penis and scrotum to further increase growth, the deep color of the scrotum, penis circumference turn, head of the penis growth stretching forward, from the foreskin of the penis covered, or completely exposed in most of the foreskin, close to adult Type. 


From the pubic about adolescent growth in the 12-year-old started from the sparse, step by step into a thin dense, black, was intensive distribution. Pubic hair is also affected by testosterone and adrenal androgen produced by the impact, with the sexual organs of the mature, male hormone increased about 18-year-old, the boy was pubic triangle steeple distribution of its cutting-edge is usually small to reach the stomach, with the typical Adult men's hair is similar. 


Adolescent sexual development in boys, the encounter of the above should not panic if there is no illness, that the normal development.