Tanner stages of puberty in boys

Stage of puberty	Age (mean ± SD)	Genitalia	Serum testosterone (ng/dL)
1		Prepubertal	87
2	11.6±1.1	Beginning enlargement of scrotum and testes; change in texture and reddening of scrotal skin	251
3	12.9±1.0	Beginning growth of the penis, mainly in length; further growth of testes and scrotum	336
4	13.8±1.0	Further growth of penis in length and breadth; further darkening of scrotal skin	525
5	14.9±1.1	Adult size genitalia	571

SD: standard deviation.

Description of genitalia from: Marshall WA, Tanner JM. Variations in the pattern of pubertal changes in boys. Arch Dis Child 1970; 45:13; serum testosterone concentrations from Lee PA, Jaffe RB, Midgely AR Jr. Serum gonadotropin, testosterone and prolactin concentrations throughout puberty in boys: a longitudinal study. J Clin Endocrinol Metab 1974; 39:664.

Graphic 76165 Version 5.0

خرید پکیج

Tanner stages of puberty in boys