Table 4. . Distribution of abnormal karyotypes with single or multiple prenatal diagnostic indications.
| Prenatal diagnoses, n (%) | Cases (n) | % | |
|---|---|---|---|
| Single factor | 2795 (89.670%) | 310 | 11.091 |
| Multiple factors | 322 (10.330%) | 124 | 37.349 |
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