Tanner Stage
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Genitals (male)
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Breasts (female)
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Pubic hair (male and female)
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I
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prepubertal (testis volume < 1.5 ml small penis (3 cm or less) (age 9 and younger)
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no glandular tissue areola follows the skin contours of the chest (prepubertal) (age 10 and younger)
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no pubic hair at all (prepubertal state) (age 10 and younger)
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II
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testis volume 1.6 to 6 ml skin on scrotum thins, reddens and enlarges penis length unchanged (age 9–11)
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breast bud forms with small area of surrounding glandular tissue areola begins to widen (age 10–11.5)
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small amount of long, downy hair with slight pigmentation at the base of the penis and scrotum (males) or on the labia majora (females) (age 10–11.5)
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III
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testis volume 6 to 12 ml scrotum enlarges further penis begins to lengthen to about 6 cm (age 11–12.5)
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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 (age 11.5–13)
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hair becomes more coarse and curly begins to extend laterally (age 11.5–13)
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IV
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testis volume 12 to 20 ml scrotum enlarges further and darkens penis increases in length to 10 cm and circumference (age 12.5–14)
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increased breast size and elevation areola and papilla form a secondary mound projecting from the contour of the surrounding breast (age 13–15)
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adult–like hair quality extending across pubis but sparing medial thighs (age 13–15)
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V
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testis volume > 20 ml adult scrotum and penis of 15 cm in length (age 14+)
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breast reaches final adult size areola returns to contour of the surrounding breast with a projecting central papilla (age 15+)
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hair extends to medial surface of the thighs (age 15+)
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Note that while typical ages are shown in brackets within the table, this is not a system for determining age.
Based upon W.A. Marshall and J.M. Tanner, published stages for girls (1969[1]) and boys (1970[2]).
Links: Tanner stages | puberty | genital | Female | Male
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