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  • Title: Effect of varicocelectomy on sperm parameters and pregnancy rate in patients with subclinical varicocele: a randomized prospective controlled study.
    Author: Yamamoto M, Hibi H, Hirata Y, Miyake K, Ishigaki T.
    Journal: J Urol; 1996 May; 155(5):1636-8. PubMed ID: 8627841.
    Abstract:
    PURPOSE: We assessed whether subclinical varicocele ligation improves fertility and/or semen parameters. MATERIALS AND METHODS: A total of 85 patients with a subclinical varicocele diagnosed by scrotal thermography presented with infertility. Patients were randomly assigned to groups 1 (high ligation of the internal spermatic vein) and 2 (followed without any treatment). At least 3 semen samples were obtained at study entry and 1 year later in both groups. RESULTS: The pregnancy rate in group 1 was 6.7% compared to 10% in group 2, and the difference was not statistically significant. Group 1 had significantly higher levels of sperm density and total motile sperm count at 1 year. There were no significant differences between groups 1 and 2 regarding change in seminal volume, sperm motility and abnormal sperm morphology. CONCLUSIONS: Subclinical varicocelectomy has some effect on spermatogenesis but no beneficial effect on pregnancy rate.
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