World Health Organization reference values for semen analysis, 2010
| Parameter | Lower reference value |
|---|---|
| Ejaculate volume | 1.5 mL |
| pH | 7.2 |
| Sperm concentration | 15 million/mL |
| Total sperm number | 39 million sperm per ejaculate |
| Percent motility | 40% |
| Forward progression | 32% |
| Sperm morphology (% normal forms by Kruger strict criteria) | 4% |
Information from reference 33.