Incidence of preterm meconium staining of the amniotic fluid (MSAF) by gestation
| Gestation (weeks) | No of births | No with MSAF | Percentage with MSAF |
|---|---|---|---|
| 23 | 28 | 0 | 0 |
| 24 | 56 | 0 | 0 |
| 25 | 43 | 2 | 4.7 |
| 26 | 63 | 4 | 6.3 |
| 27 | 52 | 3 | 5.8 |
| 28 | 94 | 7 | 7.4 |
| 29 | 141 | 7 | 5.0 |
| 30 | 147 | 7 | 4.8 |
| 31 | 186 | 7 | 3.8 |
| 32 | 244 | 8 | 3.3 |
| All | 1054 | 45 | 4.3 |