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Evidently, 15-20% of all males do. I made a similar thread in OT, but I thought I’d post in here because I found that it can decrease testosterone.
I found this study, which says:
In later studies, using microsurgical varicocelectomy techniques, Su et al. (1995) demonstrated a significant (28%) improvement in serum testosterone concentrations (from 319 ± 12 to 409 ± 23 ng/dl) in 53 infertile men with varicocele. Cayan et al. (1999) demonstrated a 48% increase in serum testosterone (5.63 ng/ml to 8.37 ng/ml) and 42% increase in free testosterone (23.1 pg/ml to 32.8 pg/ml) in 78 infertile patients, and Younes (2003) reported a similar significant increase in serum testosterone levels in 48 patients with impotence and infertility. These findings agree with the significant rates of improvement in the present study of 43% for serum testosterone and 72% in free testosterone in 83 infertile men after embolization. The measured increases in both serum and free testosterone after the procedure support the concept that ISV embolization can improve Leydig cell function in men with varicocele. In one contrasting study, Fujisawa et al. (1994) performed high ligation in 25 adolescents with varicocele and noted an improvement in sperm quality in 17 patients but no significant differences in serum testosterone levels.
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