| to morning sickness | 3 | other |
| between the two conditions | 3 | other |
| closely | 2 | degree |
| symptom → be → related | 14 |
| symptom → be → linked | 7 |
| symptom → be → associated | 5 |
| negative | neutral | positive |
| 0.475 | 0.458 | 0.066 |
| Raw frequency | 26 |
| Normalized frequency | 0.393 |
| Modifier score | 0.786 |
| Perplexity | 346.030 |