“…Approximately 15% of adult males suffer from clinical varicocoele, and 50–80% of these males have subclinical varicocoele (Zini et al ., ). Several theories have been proposed to explain the adverse effects of varicocoele, which include reduced homolateral testicular volume, impaired sperm production ranging from oligozoospermia to complete azoospermia and reduced fertility (Zini et al ., ; Benoff & Gilbert, ; Jarow, ; Marmar, ; Naughton et al ., ; Koyuncu et al ., ). However, how varicocoele affects spermatogenesis in the testis is poorly understood despite considerable research in this area (Balci et al ., ).…”