December 2023 in “Urogenital tract infection” Seminal bacteria can lower sperm quality in subfertile men.
54 citations
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September 2013 in “Fertility and Sterility” This study found that discontinuing finasteride led to a significant increase in sperm counts for most men with reduced fertility, though hormone levels and other semen parameters remained unchanged.
68 citations
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February 2019 in “Urology” Hormonal treatment in transgender women reduces semen quality, but stopping treatment may improve it.
1 citations
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August 2013 in “Fertility and Sterility” Finasteride may improve sperm count in subfertile men with low sperm count.
June 2026 in “British Journal of Dermatology” This study reviewed human evidence on the effects of 5α-reductase inhibitors, finasteride and dutasteride, on semen parameters and gonadotrophins, finding finasteride causes mild, reversible changes, while dutasteride may lead to more pronounced and potentially less reversible impacts, suggesting caution for those planning to conceive.