| Score | Explanation |
| 10 | Full spermatogenesis |
| 9 | Many late spermatids, disorganized tubular epithelium |
| 8 | Few late spermatids |
| 7 | No late spermatids, few early spermatids |
| 6 | No late spermatids, few early spermatids, arrest of spermatogenesis at spermatid stage, disturbance of spermatid differentiation |
| 5 | No spermatids, many spermatocytes |
| 4 | No spermatids, few spermatocytes, arrest of spermatogenesis at the primary spermatocyte stage |
| 3 | Spermatogonia only |
| 2 | No germ cells, Sertoli cells only |
| 1 | No seminiferous epithelial cells, tubular sclerosis |