Table 1.
Parameters used to generate normal and pathological placental hemodynamic models.
| Parameter | Normal | Mild FGR | Moderate FGR | Severe FGR | Reference |
|---|---|---|---|---|---|
| Placental volume, υ | 428 cm3 | ↓35% | ↓35% | 35% | 8, 21, 39 |
| Placental thickness, τ | 20 mm | ↓ 25% | ↓25% | ↓25% | 21, 42, 45 |
| Number of villous trees, nv | 70 | ↓45% | ↓45% | ↓45% | 9, 21 |
| Vascular seed point density | 75/cm3 | ↓10% | ↓10% | ↓10% | 10 |
| Number of capillaries per terminal villous, nc | 6 | As normal | ↓33% | ↓50% | 6, 21 |
| Umbilical artery radius | 2 mm | ↓20% | ↓20% | ↓20% | 8, 21 |
| Umbilical vein radius | 4 mm | ↓20% | ↓20% | ↓20% | 8, 21 |