Necrospermia
| -spermia, Further information: Testicular infertility factors |
| Aspermia —lack of semen; anejaculation |
| Asthenozoospermia —sperm motility below lower reference limit |
| Azoospermia —absence of sperm in the ejaculate |
| Hyperspermia —semen volume above higher reference limit |
| Hypospermia —semen volume below lower reference limit |
| Oligozoospermia —total sperm count below lower reference limit |
| Necrozoospermia—absence of living sperm in the ejaculate |
| Teratozoospermia —percent normal forms below lower reference limit |
Necrospermia (or necrozoospermia) is a condition in which there is a low percentage of live and a very high percentage of immotile spermatozoa in semen.
Necrospermia is usually confused with asthenozoospermia, which is the inability of the sperm to move even when alive. To check for necrospermia, samples with a high percentage of immobile sperm are stained to check for vitality. If they are dead sperm they will be stained, as the membrane is broken and the dye enters indiscriminately. Necrozoospermia is a rare condition with a reported prevalence of 0.2-0.48% in infertile subjects.