Finasteride improves hair but may reduce sperm quality at higher doses.
Some drugs can reduce male semen quality.
October 2010 in “Journal of Men's Health” Larger prostate size in older men may be linked to poorer semen quality and fertility issues.
January 2008 in “Yearbook of Endocrinology” Dutasteride and finasteride can change semen and hormone levels in men.
37 citations
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May 1997 in “The Journal of Clinical Endocrinology & Metabolism” MK-386 lowers DHT in blood and skin but not in semen.
2 citations
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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” February 2026 in “European Urology” June 2014 in “The Journal of Urology”
195 citations
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February 2007 in “The Journal of Clinical Endocrinology and Metabolism” Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.
115 citations
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December 1996 in “PubMed” The safe daily selenium intake is up to 819 micrograms.
55 citations
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February 1990 in “Journal of Nutrition” Selenium in hair and nails is higher with L-selenomethionine and low methionine.
125 citations
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January 1999 in “Drugs” Finasteride effectively treats baldness but may cause sexual side effects.
77 citations
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June 2015 in “Nature Reviews Urology” Some common medications can harm male fertility, but many effects can be reversed.
49 citations
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December 2007 in “Fertility and Sterility” Stopping finasteride improved sperm counts in two men, reducing the need for fertility treatments.
47 citations
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January 2021 in “Fertility and Sterility” COVID-19 might affect male fertility, but more research is needed to understand the full impact.
38 citations
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December 2010 in “Fertility and Sterility” Finasteride may cause male infertility, stopping it can help.
18 citations
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July 2020 in “Basic and Clinical Andrology” Wait 3 months after COVID-19 before trying assisted reproduction and further research is needed on COVID-19's effects on male hormones and fertility.
18 citations
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October 2018 in “Journal of The American Academy of Dermatology” Some skin medications can harm male fertility, but they don't seem to cause birth defects from father's exposure.
17 citations
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May 2021 in “Journal of Assisted Reproduction and Genetics” COVID-19 may harm male fertility and damage the reproductive system.
15 citations
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January 2017 in “Advances in Experimental Medicine and Biology” 5α-Reductase inhibitors can negatively affect male sexual function and, in some cases, significantly reduce sperm count, but these effects may be reversible.
15 citations
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October 2012 in “International Urology and Nephrology” Low-dose finasteride may cause fertility issues, but stopping it can improve sperm quality and lead to pregnancy.
14 citations
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January 2018 in “Advances in Clinical Chemistry” The document concludes that hormonal biomarkers are key for diagnosing hyperandrogenemia in women and hypogonadism in men.
11 citations
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March 2010 in “International Journal of Andrology” Finasteride 1-mg doesn't harm sperm or pregnancy chances.
9 citations
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April 2019 in “International Journal of Molecular Sciences” Kojyl cinnamate ester derivatives can promote hair growth by increasing adiponectin production in fat tissues.
8 citations
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January 2017 in “Fertility and Sterility” Urologic diseases and treatments in older men can negatively affect fertility, and doctors should talk to patients about this.
5 citations
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December 2012 in “PubMed” Stopping the use of the drug finasteride can improve sperm count and does not prevent normal conception, but caution is advised when trying to conceive.
4 citations
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November 2012 in “Dermatitis” A man got severe skin irritation after using marking nut sap for hair loss.
3 citations
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March 2019 in “Contact Dermatitis” Using Indian marking nut sap for hair loss caused a skin rash on a woman's face.