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| Variable | Control group | Experiment group |
| Number of cases | 66 | 62 |
| Age (years) | 31 | 31 |
| Parity | 1 | 1 |
| BMI (kg/m2) | 22.47 ± 4.08 | 21.41 ± 1.93 |
| Weight of first child (kg) | 3.17 ± 0.39 | 3.25 ± 0.60 |
| Weight of second child (kg) | 3.22 ± 0.37 | 3.22 ± 0.44 |
Mean ± SD.
