Tube size | Volume colloid (mL) | Volume extended semen* (mL) | Reference |
12 - 15 mL | 1.0 | 0.25 | [36] |
12 - 15 mL | 4.0 | Up to 4.5 | [32] |
50 mL | 15 | Up to 20 | [32] [33] [59] * |
100 mL | 20 | 25 | [33] |
200 mL | 60 | 60 | [32] |
500 mL | 150 | 150 | [33] |