| very | 12 | degree |
| during specific time windows of exposure | 7 | temporal |
| to air pollution | 7 | cause |
| fetus → be → sensitive | 21 |
| fetus → be → more sensitive | 8 |
| fetus → be → most sensitive | 3 |
| negative | neutral | positive |
| 0.389 | 0.554 | 0.057 |
| Raw frequency | 32 |
| Normalized frequency | 0.475 |
| Modifier score | 0.500 |
| Perplexity | 395.070 |