| Mean | SD | Range | |
| Mother Age (years) | 29.83 | 4.49 | 26 - 36 |
| Mother Education (years) | 13.66 | 4.80 | 6 - 20 |
| Father Age (years) | 34.66 | 5.60 | 26 - 40 |
| Father Education (years) | 12.0 | 5.05 | 6 – 18 |
| Gestational Age (weeks) | 35.3 | 1.21 | 34-36 |
| Birth Weight (kg) | 2,455 | 254.06 | 2,100 - 2,800 |
| Birth Height (cm) | 49 | 1.16 | 48 – 51 |
| Breastfeeding (days) | 56.25 | 33.36 | 30-105 (for four twin infants) |
| Sex of twin pairs | two same-sex and four opposite sex pairs | ||
| Male/ Female | 66.6% (male) | ||
| Way of Delivery | Casaerian Section | ||
| Birth order | First born children in the family | ||
| Family Compostion | Two-parent families | ||
| Socio-economic Stastus | Middle-class families [32] | ||