Table. 1 Johnsen score description

10

Complete spermatogenesis and perfect tubules

9

Slightly impaired spermatogenesis, many late spermatids, disorganized epithelium

8

Less than five spermatozoa per tubule, few late spermatozoa

7

No spermatozoa, no late spermatids, many early spermatids

6

No spermatozoa, no late spermatids, few early spermatids

5

No spermatozoa, no late spermatids, many spermatocytes

4

No spermatozoa and spermatids, few spermatocytes

3

Spermatogonia only

2

No germinal cell, Sertoli cells only

1

No seminiferous epithelium