Table 3. Distributions of 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 selected as being 'normal' by Tygerberg criteria.
| Median | Mean | Max | Min | Range | 5% centiles | 95% centiles | |
|---|---|---|---|---|---|---|---|
| Spermatozoa in semen and after swim-up (central tendency of 404 cells) | |||||||
| Length (μm) | 4.33 | 4.33 | 5.32 | 3.40 | 1.92 | 3.82 | 4.88 |
| Width (μm) | 2.90 | 2.90 | 3.59 | 2.40 | 1.19 | 2.59 | 3.25 |
| Area (μm2) | 10.21 | 10.26 | 13.83 | 6.84 | 6.96 | 8.54 | 12.24 |
| Perimeter (μm) | 12.43 | 12.49 | 14.51 | 10.03 | 4.48 | 11.26 | 13.88 |
| Acrosome (%) | 49.00 | 48.76 | 65.86 | 23.88 | 41.98 | 35.84 | 60.15 |
| L/W | 1.49 | 1.50 | 1.93 | 1.19 | 0.73 | 1.32 | 1.67 |
| P/A | 1.22 | 1.22 | 1.54 | 1.03 | 0.51 | 1.11 | 1.35 |