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Analysis of the correlation between the levels of relaxin and other factors
| Gestational age (wk) | Age at delivery (yr) | Pre-pregnancy weight (kg) | Weight gain during pregnancy (kg) | Neonatal weight (g) | Delivery duration | ||
| Relaxin level | Pearson’s correlation coefficient | 0.145 | 0.118 | −0.081 | 0.012 | 0.002 | 0.034 |
| P value | 0.301 | 0.339 | 0.563 | 0.931 | 0.986 | 0.808 |
