Table 3.
Length and transverse diameters for proximal end, middle part and distal end of the left ulna’s shaft primary ossification center in human fetuses
| Gestational age (weeks) | N | Length (mm) | Transverse diameter (mm) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Proximal end | Middle part | Distal end | |||||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
| 17 | 3 | 18.79 | 0.16 | 1.51 | 0.06 | 1.22 | 0.10 | 1.12 | 0.01 |
| 18 | 3 | 19.01 | 0.03 | 1.96 | 0.24 | 1.33 | 0.01 | 1.25 | 0.10 |
| 19 | 5 | 19.53 | 0.40 | 2.46 | 0.10 | 1.41 | 0.04 | 1.46 | 0.04 |
| 20 | 3 | 21.18 | 0.64 | 2.65 | 0.04 | 1.55 | 0.06 | 1.70 | 0.14 |
| 21 | 4 | 23.03 | 1.94 | 2.76 | 0.10 | 1.60 | 0.05 | 1.93 | 0.20 |
| 22 | 2 | 26.64 | 0.62 | 3.18 | 0.01 | 1.79 | 0.04 | 2.24 | 0.13 |
| 23 | 3 | 28.00 | 0.69 | 3.42 | 0.01 | 1.89 | 0.02 | 2.47 | 0.12 |
| 24 | 6 | 30.09 | 0.80 | 3.93 | 0.11 | 1.95 | 0.44 | 2.63 | 0.03 |
| 25 | 3 | 32.10 | 0.39 | 4.16 | 0.03 | 2.20 | 0.05 | 2.72 | 0.03 |
| 26 | 3 | 33.63 | 0.57 | 4.29 | 0.04 | 2.25 | 0.02 | 3.09 | 0.05 |
| 27 | 5 | 34.55 | 0.10 | 4.60 | 0.16 | 2.33 | 0.04 | 3.34 | 0.23 |
| 28 | 2 | 34.82 | 0.14 | 4.85 | 0.04 | 2.46 | 0.01 | 3.34 | 0.23 |
| 29 | 2 | 35.60 | 0.01 | 5.03 | 0.11 | 2.53 | 0.02 | 4.20 | 0.04 |
| 30 | 4 | 37.37 | 1.50 | 5.39 | 0.19 | 2.62 | 0.07 | 4.47 | 0.16 |