Table 2.
Medical Definitions for Semen Samples Per WHO 2010.13
| Asthenozoospermia | Percentage of progressively motile spermatozoa <32% (fifth percentile relative to the average fertile male) |
| Azoospermia | Absence of spermatozoa in the ejaculate |
| Necrozoospermia | Absence of live or motile spermatozoa in ejaculate |
| Normozoospermia | Total number of spermatozoa >39 million per ejaculate or concentration >15 million/mL, and percentages of progressively motile (PR) >32% and morphologically normal spermatozoa >4% |
| Oligozoospermia | Total number of spermatozoa <39 million per ejaculate or concentration <15 million/mL |
Abbreviation: WHO, World Health Organization.