| from sperm | 2 | other |
| in a lab | 2 | location |
| between 2005 | 2 | temporal |
| embryo → use → ivf | 11 |
| embryo → be used in → ivf | 10 |
| embryo → be obtained through → ivf | 5 |
| embryo → be implanted via → ivf | 3 |
| negative | neutral | positive |
| 0.154 | 0.732 | 0.113 |
| Raw frequency | 29 |
| Normalized frequency | 0.452 |
| Modifier score | 0.900 |
| Perplexity | 61.382 |