FIGURE 1.

(a) The spermatogenesis process is initiated by spermatogonia's mitosis, and meiosis led to spermatid formation. Blood‐testis‐barrier organising by Sertoli cells makes specific virus blockade environment. (b) It is speculated that co‐expression is necessary for SARS‐CoV‐2 entrance. Controversial results display various levels of ACE2 and TMPRSS2 expression among various stages of reproductive cells of male genitalia. Recently, Furin and CD147 have also been suggested as another potential host cell receptors for SARS‐CoV‐2