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Pubertal Stage by Age
| Tanner stages (corresponding puberty scores) | 11 years | 12 years | 13 years |
|---|---|---|---|
| I. Prepubertal (3) | 21% | 7% | 1% |
| II. Beginning puberty (4–5) | 53% | 40% | 24% |
| III. Mid puberty (6–8) | 25% | 49% | 66% |
| IV. Advanced puberty (9–11) | 1% | 3% | 9% |
| V. Postpubertal (12) | 0% | 0% | 0% |
