| Marital status | Twin pregnancy (n = 55) | Singleton pregnancy (n = 55) | ||
| Frequency (%) | Percentage | Frequency (%) | Percentage | |
| Single | 14 | 25.5 | 16 | 29.1 |
| Married | 38 | 69 | 35 | 63.6 |
| Concubine | 3 | 5.5 | 4 | 7.3 |
| Total | 55 | 100 | 55 | 100 |