104 citations
,
October 1999 in “The Journal of Urology” This study concluded that daily treatment with 1 mg finasteride did not affect spermatogenesis or semen production in young men and had small, reversible effects on prostate volume and serum PSA.
49 citations
,
December 2007 in “Fertility and Sterility” This case report describes two infertile patients who experienced significant improvements in sperm concentrations six months after stopping finasteride.
18 citations
,
June 2009 in “Journal of Molecular Endocrinology” This study found that exposure to finasteride impaired spermatogenesis in male Xenopus laevis by affecting sex-specific feedback mechanisms in the hypothalamus–pituitary–gonad axis.
18 citations
,
May 2002 in “BJUI” This study found that chronic exposure to finasteride did not significantly impact spermatogenesis in rats.
15 citations
,
March 2015 in “PloS one” This study demonstrated that an AR-EGFP transgene can restore AR function and fertility in Sertoli cell-specific AR knockout mice, highlighting its potential use in understanding androgen receptor functions.
2 citations
,
September 2007 in “Fertility and Sterility” This study reported significant improvements in sperm concentration in two cases of azoospermia and severe oligospermia after discontinuing finasteride 1 mg used for hair loss.
January 2024 in “Journal of Applied Health Sciences and Medicine” In this study, Nephrolepis biserrata extract significantly improved fertility indices in male Wistar rats with testosterone propionate-induced benign prostatic hyperplasia, showing increased sperm count and reduced prostate weight, suggesting potential pro-fertility benefits for BPH-related infertility.
11 citations
,
March 2010 in “International Journal of Andrology” This article reviews multiple entries on the Androlog blog regarding finasteride use, concluding that a 1-mg dose does not adversely affect spermatogenesis or pose a risk during conception or pregnancy.
1 citations
,
May 2024 in “The Journal of Sexual Medicine” This case report suggests that clomiphene citrate can effectively restore fertility in some men with a long history of anabolic steroid abuse, though individual responses to treatment vary.
1 citations
,
January 2002 in “Yaoxue jinzhan” This study found that Epristeride and Finasteride reduced prostate development and testis weight in male rats, but only Finasteride appeared to impact reproductive function.
October 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” This study found that a mild intramuscular dose of BOTOX increased spermatogenesis and improved sperm quality in ageing mice, suggesting potential benefits for managing male infertility.
June 2011 in “Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)” The researchers reported that both estrogen receptors ERα and ERβ are expressed in human testis, and identified two novel genes, Aven and Regucalcin, linked to estrogen and androgen regulation, which may be crucial for spermatogenesis.
This study found that finasteride treatment in adult hamsters led to significant testicular alterations and reduced spermatogenesis compared to untreated controls.
July 2007 in “Journal of Reproduction & Infertility” This study found that in male rats, finasteride significantly decreased spermatogonia and primary spermatocytes numbers and increased Leydig cells, but did not affect overall testis histology or spermatogenesis.
August 2020 in “DOAJ (DOAJ: Directory of Open Access Journals)” This study found that Finasteride at doses of 5 mg or higher may reduce the expression of key spermatogenesis biomarkers, potentially impacting male fertility in mice.
14 citations
,
March 2020 in “Cold Spring Harbor Perspectives in Biology” This review discusses the flexibility and diversity of tissue stem cell systems, particularly focusing on the motility and ligand distribution of spermatogenic stem cells, without presenting new experimental results.
77 citations
,
February 2017 in “Stem Cell Reports” This study found that activation of Wnt/β-catenin signaling in mouse testes promotes spermatogonial differentiation and reduces the stem cell pool, with SHISA6 inhibiting this process and maintaining stem cell characteristics.
2 citations
,
March 2017 in “Canadian Urological Association journal” This case report documents the first use of clomiphene citrate to potentially improve fertility in a man taking finasteride, highlighting sperm count issues associated with the medication.
31 citations
,
January 2001 in “PubMed” In this randomized study of male contraceptive regimens, adding finasteride did not significantly enhance spermatogenesis suppression compared to the control group.
This study found that chronic administration of dutasteride in rats did not affect spermatogenesis or oxidative stress in the testes, although it altered hormone levels.
5 citations
,
June 2008 in “Acta Cirurgica Brasileira” This study found that finasteride administration in hamsters led to significant spermatogenesis reduction and seminiferous tubule atrophy compared to the control group.
January 2013 in “Reproductive Biology”
April 2026 in “Research Square” This study found that COVID-19 infection disrupts spermatogenesis, alters testicular cell populations, and may impact male fertility by causing long-term changes in testicular function and reduced sperm quality, as observed even in patients who have recovered from the acute phase of the infection.
2 citations
,
December 2001 in “PubMed” In this review, the authors found no evidence of harmful pregnancy outcomes from exposure to finasteride, and report that handling the medication poses negligible risk to a fetus.
2 citations
,
October 2000 in “The Journal of Urology” Finasteride daily doesn't affect sperm production or semen in young men.
2 citations
,
October 1999 in “The Journal of Urology” 11 citations
,
November 2023 in “Journal of Functional Biomaterials” This study investigated nanocomposite scaffolds made from alginate, chitosan, and graphene oxide to promote the proliferation of spermatogonial stem cells, finding the ALGCS/GO30 scaffold to be particularly effective due to increased proliferation markers and PLZF protein expression compared to controls.
2 citations
,
March 2022 in “Laboratory Animal Research” This study suggests that a mild intramuscular dose of botulinum toxin improved spermatogenesis and sperm parameters in ageing mice.
77 citations
,
June 2015 in “Nature Reviews Urology” This article reviews the effects of various medications on male fertility, noting that while commonly used drugs can mostly have reversible impacts, conclusive human evidence remains limited.