Template:Tanner stages
From Embryology
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+)