Anthropometric measurements of the external genitalia
| Sex | Population | Age | Stretched penile length | Penile width | Mean testicular | Reference |
|---|---|---|---|---|---|---|
| (PL) (cm) | (cm) | volume (ml) | ||||
| M | USA | 30 wks GA | 2.5 | 26 | ||
| M | USA | Full term | 3.5 (0.4) | 1.1 (0.1) | 0.52 (median) | 26, 27 |
| M | Japan | Term to 14 years | 2.9 (0.4) to 8.3 (0.8) | 28 | ||
| M | Australia | 24–36 weeks GA | PL = 2.27 + (0.16 GA) | 29 | ||
| M | China | Term | 3.1 (0.3) | 1.07 (0.09) | 30 | |
| M | India | Term | 3.6 (0.4) | 1.14 (0.07) | 30 | |
| M | N America | Term | 3.4 (0.3) | 1.13 (0.08) | 30 | |
| M | Europe | 10 years | 6.4 (0.4) | 0.95 to 1.20 | 27, 31 | |
| M | Europe | Adult | 13.3 (1.6) | 16.5 to 18.2 | 27, 31 |
| Sex | Population | Age | Clitoral length (mm) | Clitoral width (mm) | Perineal length* (mm) | Reference |
|---|---|---|---|---|---|---|
| Values are mean (SD) unless specified. | ||||||
| *Distance from posterior fourchette to anterior anal margin. | ||||||
| GA, gestational age; PL, penile length. | ||||||
| F | USA | Full term | 4.0 (1.24) | 3.32 (0.78) | 32 | |
| F | USA | Adult nulliparous | 15.4 (4.3) | 33 | ||
| F | UK | Adult | 19.1 (8.7) | 5.5 (1.7) | 31.3 (8.5) | 34 |