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Table. 1 Johnsen score description

From: The protective effect of crocin on cisplatin-induced testicular impairment in rats

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