Genital stage | Age range (years) | Testis width in scrotum (cm) | Testicular volume Observed (ml) | Length of penis (cm) Mean ± SD - Observed range |
---|---|---|---|---|
1 | Up to 13.25 | > 1.0 to < 1.3 | < 1.27 | Early childhood 4.8 ± 0.64 - Observed 3.5 to 6.0 |
2 | 10 to 15 | > 1.5 to 2.1 | > 2.1 to 6.5 | Early childhood 5.3 ± 0.75 - Observed 4.0 to 6.5 |
3 | 11.4 to 15 | > 1.9 to 2.2 | 4.6 to 7.4 | Growth of penis 7.4 ± 0.49 - Observed 7.0 to 8.0 |
4 | 11.6 to 17 | > 2.1 to 2.6 | 6 to 12.3 | Development of glans 8.6 ± 1.29 - Observed 6.5 to 12.0 cm |
5 | 13 to 17.5 | > 2.5 to 3.1 | 10.7 to 21.4 | 9.5 ± 0.99 - Observed 7.5 to 11.0 |
Adult | > 16 | > 2.5 to 3.1 | 10.6 to 21.2 | 9.7 ± 1.01 - Observed 8.0 to 11.0 |