Abstract
Main problemTestosterone replacement therapy inhibits spermatogenesis, representing a problem for hypogonadal men of reproductive age.MethodsA literature review of PubMed from 1990-2013. Semen analysis and pregnancy outcomes, time to recovery of spermatogenesis, serum and intratesticular testosterone levels were examined.ResultsExogenous testosterone suppresses intratesticular testosterone production, which is an absolute prerequisite for normal spermatogenesis. Therapies that protect the testis involve human chorionic gonadotropin (hCG) therapy or selective estrogen receptor modulators (SERMs), but may also include low dose hCG with exogenous testosterone. SERMs, such as clomiphene citrate, are effective for maintaining testosterone production and represent a well-tolerated, oral therapy. Routine use of aromatase inhibitors is not recommended based on a lack of long-term data.ConclusionsExogenous testosterone supplementation decreases sperm production. Studies of hormonal contraception indicate that most men have a return of normal sperm production within 1 year after discontinuation. Clomiphene citrate is a safe and effective therapy for men who desire to maintain future potential fertility. Although less frequently used in the general population, hCG therapy with or without testosterone supplementation represents an alternative treatment.
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