Table 1.

Johnsen's score for spermatogenic function.

Score	Characteristics
10	Complete spermatogenesis with many spermatozoa
9	Many spermatozoa present but germinal epithelium disorganized with marked sloughing or obliteration
8	Only few spermatozoa (<5–10) present in the section
7	No spermatozoa but many spermatids present
6	No spermatozoa and only few spermatids (<5–10) present
5	No spermatozoa and no spermatids but several or many spermatocytes present
4	Only few spermatocytes (<5) and no spermatids or spermatozoa present
3	Spermatogonia are the only germ cells present
2	No germ cells but Sertoli cells are present
1	No cells in tubular section