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Johnsen’s scoring system a histopathological examination of testicular tissue.
| Scheme. | Score Description |
|---|---|
| 1 | No cell |
| 2 | Sertoli cells without germ cells |
| 3 | Only spermatogonia |
| 4 | Only a few spermatocytes |
| 5 | Many spermatocytes |
| 6 | Only a few early spermatids |
| 7 | Many early spermatids without differentiation |
| 8 | Few late spermatids |
| 9 | Many late spermatids |
| 10 | Full spermatogenesis |
