Table 2. Distributions of all values of head length, width, area, perimeter, acrosomal head coverage, and length/width (L/W) and perimeter/area (P/A) ratios for spermatozoa in semen and after swim-up: all spermatozoa considered.
| Median | Mean | Max | Min | Range | 5% centiles | 95% centiles | |
|---|---|---|---|---|---|---|---|
| Spermatozoa in semen (central tendency of 7 942 cells) | |||||||
| Length (μm) | 4.38 | 4.42 | 8.21 | 2.74 | 5.47 | 3.58 | 5.38 |
| Width (μm) | 2.79* | 2.70 | 4.38 | 1.17 | 3.21 | 2.29 | 3.29 |
| Area (μm2) | 9.77* | 10.03 | 19.10 | 5.26 | 13.84 | 7.57 | 12.62 |
| Perimeter (μm) | 12.53* | 12.60 | 23.1 | 8.88 | 14.22 | 10.68 | 14.61 |
| Acrosome (%) | 46.7* | 45.90 | 74.30 | 12.00 | 62.30 | 29.90 | 59.30 |
| L/W | 1.57* | 1.64 | 6.39 | 0.97 | 5.32 | 1.25 | 2.12 |
| P/A | 1.28* | 1.26 | 2.22 | 0.01 | 2.21 | 1.09 | 1.45 |
| Spermatozoa after swim-up (central tendency of 4 812 cells) | |||||||
| Length (μm) | 4.39 | 4.42 | 6.67 | 3.15 | 3.52 | 3.71 | 5.21 |
| Width (μm) | 2.86 | 2.87 | 4.64 | 2.07 | 2.57 | 2.40 | 3.35 |
| Area (μm2) | 10.31 | 10.33 | 20.74 | 6.01 | 14.72 | 8.04 | 12.65 |
| Perimeter (μm) | 12.61 | 12.61 | 18.03 | 0.97 | 17.01 | 11.00 | 14.22 |
| Acrosome (%) | 48.30 | 47.50 | 66.50 | 14.50 | 52.00 | 33.40 | 59.10 |
| L/W | 1.53 | 1.54 | 3.05 | 1.06 | 2.00 | 1.26 | 1.95 |
| P/A | 1.22 | 1.22 | 1.79 | 0.09 | 1.71 | 1.10 | 1.40 |
*
P < 0.05, compared with sources of spermatozoa after swim-up.