Template:Tanner stages

From Embryology
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Tanner Stages
Tanner Stage Genitals (male) Breasts (female) Pubic hair (male and female)
Tanner I
Tanner II
Tanner IIII
Tanner IV
Tanner V


Genitals (male)

Tanner I
prepubertal (testicular volume less than 1.5 ml; small penis of 3 cm or less) (typically age 9 and younger)
Tanner II
testicular volume between 1.6 and 6 ml; skin on scrotum thins, reddens and enlarges; penis length unchanged (9–11)
Tanner III
testicular volume between 6 and 12 ml; scrotum enlarges further; penis begins to lengthen to about 6 cm (11–12.5)
Tanner IV
testicular volume between 12 and 20 ml; scrotum enlarges further and darkens; penis increases in length to 10 cm and circumference (12.5–14)
Tanner V
testicular volume greater than 20 ml; adult scrotum and penis of 15 cm in length (14+)

Breasts (female)

Tanner I
no glandular tissue: areola follows the skin contours of the chest (prepubertal) (typically age 10 and younger)
Tanner II
breast bud forms, with small area of surrounding glandular tissue; areola begins to widen (10–11.5)
Tanner III
breast begins to become more elevated, and extends beyond the borders of the areola, which continues to widen but remains in contour with surrounding breast (11.5–13)
Tanner IV
increased breast size and elevation; areola and papilla form a secondary mound projecting from the contour of the surrounding breast (13–15)
Tanner V
breast reaches final adult size; areola returns to contour of the surrounding breast, with a projecting central papilla. (15+)

Pubic hair (both male and female)

Tanner I
no pubic hair at all (prepuberta] state) (typically age 10 and younger)
Tanner II
small amount of long, downy hair with slight pigmentation at the base of the penis and scrotum (males) or on the labia majora (females) (10–11.5)
Tanner III
hair becomes more coarse and curly, and begins to extend laterally (11.5–13)
Tanner IV
adult–like hair quality, extending across pubis but sparing medial thighs (13–15)
Tanner V
hair extends to medial surface of the thighs (15+)