| Patients Group | Age (years) | Maternal weight gain | ||
| r-value | p-value | r-value | p-value | |
| Hadlock | 0.087 | 0.390 | −0.112 | 0.265 |
| BW by TC | 0.119 | 0.237 | −0.047 | 0.641 |
| BW by SCT 1000 | 0.024 | 0.815 | 0.022 | 0.826 |