| during pregnancy | 21 | temporal |
| in their systems | 5 | location |
| mother → use → drug | 54 |
| mother → do → drug | 8 |
| mother → use → the drug | 4 |
| mother → have → drug | 3 |
| mother → use → other drugs | 3 |
| negative | neutral | positive |
| 0.700 | 0.286 | 0.013 |
| Raw frequency | 72 |
| Normalized frequency | 0.624 |
| Modifier score | 0.800 |
| Perplexity | 103.687 |