Fig. 1. Histological presentation of testicular sections of biopsies.

The histological staining by H&E of testicular biopsy with normal spermatogenesis shows seminiferous tubules with complete spermatogenesis that contain all types of spermatogenesis cells such as spermatogonial cells (SPG), spermatocytes (SPC), round spermatid (RS), spermatozoa (SPZ) and Sertoli cells (SC) (according to their location in the seminiferous tubule and the shape of the nucleus). However, the testicular biopsy of the patient 1 showed maturation arrest in the seminiferous tubules that contained only SPG and SC and the biopsy of patient 2 presented complete spermatogenesis with reduced number of RS and SPZ.