| Fetal complications | Premature ≥ 34 WA | Premature < 34 WA | Total | P | |||
| Number | % | Number | % | Number | % | ||
| Oligohydramnios | 64 | 27.7 | 37 | 21.9 | 101 | 25.3 | 0.114 |
| DIU | 29 | 12.6 | 43 | 25.4 | 72 | 18 | <0.002 |
| CFD | 45 | 19.5 | 22 | 13 | 67 | 16 | <0.05 |