Table 4.
Causes of SVI/BL by aetiological category
| Aetiological category | Number | % |
| Hereditary disease | 21 | 14.9 |
| Intrauterine factor | 11 | 7.9 |
| Perinatal factor | 0 | 0 |
| Childhood factor | 54 | 38.6 |
| Unknown | 54 | 38.6 |
| Total | 140 | 100 |
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