Is it better for children to be close in age or further away in age?
How many years would you say are the best to separate siblings?
| Less than a year (Irish Twins) | 2 | |
| 1 year | 1 | |
| 2 years | 4 | |
| 3 years | 4 | |
| 4 years | 0 | |
| 5 years | 1 | |
| 6 years | 0 | |
| 7 years | 0 | |
| 8 years | 0 | |
| 9 years | 0 | |
| 10 years | 0 | |
| 11 years | 0 | |
| 12 years | 0 | |
| 13 years | 0 | |
| 14 or more years | 1 |