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Breast expression characteristics
| Median | IQR | Minimum | Maximum | |
| Volume per expression (g) | 52 | 42.65 | 1.8 | 2.57 |
| Volume per expression (left breast) (g) | 53 | 37 | 5 | 257 |
| Volume per expression (right breast) (g) | 49.8 | 50.8 | 1.8 | 243 |
| Duration per expression (minute) | 17.5 | 10 | 4 | 80 |
| Short-term rate of milk synthesis (g/hour) | 16.2 | 12.7 | 1.1 | 106.6 |
| Number of expressions per day | 6 | 1 | 3 | 9 |
| Daily milk volume (g) | 676.9 | 462.5 | 139.4 | 1801 |
