| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OUTPAT | OUTPAT_ICD10(Q910) | Trisomy 18, meiotic nondisjunction | 8 | |
| OUTPAT | OUTPAT_ICD10(Q911) | Trisomy 18, mosaicism (mitotic nondisjunction) | 6 | |
| INPAT | INPAT_ICD10(Q913) | Edwards syndrome, unspecified | 5 | |
| OUTPAT | OUTPAT_ICD10(Q912) | Trisomy 18, translocation | 5 |