| Value | Category |
|---|---|
| 10 | Single birth/not a twin |
| 20 | Twin or multiple |
| 21 | 1st of multiple births |
| 22 | 2nd of multiple births |
| 23 | 3rd of multiple births |
| 24 | 4th of multiple births |
| 25 | 5th of multiple births |
| 26 | 6th of multiple births |
| var_concept.title | Vocabulary |
|---|---|
| Child demography core Variables -- TOPICS | IPUMS |