Table 1.

Mean testicular biopsy score (MTBS) classifcation

Score	Description
1	No cells in tubular section
2	No germ cells but Sertoli cells are present
3	Spermatogonia are the only germ cells present
4	Only few spermatocytes and no spermatids or spermatozoa present
5	No spermatozoa,no spermatids but several or many spermatocytes present
6	No spermatozoa and only few spermatids present
7	No spermatozoa but many spermatids present
8	Only few spermatozoa present in section
9	Many spermatozoa present but germinal epithelium disorganized with marked sloughing or obliteration of lumen
10	Complete spermatogenesis with many spermatozoa. Germinalepithelium organized in a regular thickness leaving an open lumen