Table 2.
Overview of embryos karyotype categories
| Case reported | No. of embryos | Proportion |
| Embryos in database | 18,387 | . |
| Unknown karyotype | 3,664 | . |
| Suspect duplicates | 19 | . |
| Unknown maternal age | 1,848 | . |
| Errors affecting paternal chromosomes | 1,443 | . |
| Segmental duplications | 256 | . |
| Embryos for analysis | 11,157 | 1 |
| No. of patients | 2,920 | . |
| Embryos with normal karyotype (46,XX or 46,XY) | 7,221 | 0.647 |
| Embryos with one error | 2,537 | 0.227 |
| Single trisomy | 1,273 | 0.114 |
| Single monosomy | 1,264 | 0.113 |
| Embryos with two errors | 768 | 0.069 |
| Double monosomy | 217 | 0.019 |
| Trisomy and monosomy | 344 | 0.031 |
| Double trisomy | 207 | 0.019 |
| Embryos with complex aneuploidies (>2 errors) | 631 | 0.057 |
PGT-A day-5 data and the proportion of each embryo type are shown. The nine underlined entries were used in the model selection step. Period (.) indicates not applicable.