Mean pulse wave velocity (m/s) according to maternal weight and pelvic size
| Aorto-left radial segment | Aortofemoral segment | Aortoposterior tibial segment | |
| Maternal weight (lb) | |||
| < 94 | 4.13 (44) | 3.35 (45) | 5.69 (45) |
| 94–107 | 4.04 (70) | 3.26 (72) | 5.64 (72) |
| 108+ | 3.99 (58) | 3.15 (56) | 5.69 (59) |
| All | 4.05 (172) | 3.25 (173) | 5.67 (176) |
| p Value | 0.18 | 0.05 | 0.9 |
| 5-150p Value | 0.06 | 0.01 | 0.4 |
| 5-151p Value | 0.1 | 0.04 | 0.4 |
| External conjugate diameter (cm) | |||
| < 17.8 | 4.15 (44) | 3.30 (46) | 5.85 (46) |
| 17.8–18.9 | 4.05 (107) | 3.39 (111) | 5.74 (111) |
| 19.0+ | 3.98 (81) | 3.25 (81) | 5.66 (84) |
| All | 4.05 (232) | 3.32 (238) | 5.73 (241) |
| p Value | 0.09 | 0.4 | 0.1 |
| 5-150p Value | 0.04 | 0.2 | 0.05 |