4 citations
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January 2001 in “PubMed” This study found that delmadinone acetate and finasteride caused a reversible suppression of prostate gland activity in male dogs, with delmadinone acetate also temporarily altering epididymal sperm maturation.
68 citations
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February 2019 in “Urology” Hormonal treatment in transgender women reduces semen quality, but stopping treatment may improve it.
16 citations
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January 2017 in “Asian journal of andrology/Asian Journal of Andrology” This study found that older age at puberty may be associated with lower semen quality and altered reproductive hormone levels in young men, though only some results were statistically significant.
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.
January 2018 in “日本薬理学会年会要旨集 =” This study reports that in young male patients with finasteride-associated infertility, semen parameters appear reversible after discontinuing the medication.