| Psychometric assessment | Control group | Pregnant group |
| Delayed matching to sample (working memory, first trimester) | 86.66 (SD 7.5) | 79.23 (SD 8.5) (p = 0.006) |
| Delayed matching to sample probability error (emotional response, first trimester) | 0.06 (SD 0.10) | 0.16 (SD 0.11) (p = 0.008) |
| Spatial recognition memory (working memory, second trimester) | 83.75 (SD 8.4) | 73.33 (SD 13.7) (p = 0.02) |