October 2010 in “Journal of Men's Health” The conclusion is that doctors should be careful when prescribing 5α-reductase inhibitors due to possible serious side effects, and they should discuss these risks with patients.
August 2015 in “Dermatologica Sinica” Men with severe hair loss may have poorer sperm quality.
198 citations,
April 2020 in “Journal of Endocrinological Investigation” The virus was not found in the semen and urine of a man who tested positive for COVID-19.
1 citations,
May 2023 in “Fertility and sterility” Men who went through puberty later had lower sperm counts and altered hormone levels, possibly affecting fertility.
1 citations,
September 2013 in “Fertility and Sterility” Finasteride may improve sperm count in subfertile men with low sperm count.
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.
4 citations,
January 2001 in “PubMed” 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” 195 citations,
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.
1 citations,
May 2011 in “Journal of Human Reproductive Sciences” Finasteride may decrease semen quality but not harm sperm production, and stopping the drug can improve semen quality; hyperprolactinemia can cause infertility but is treatable with medication.
April 2017 in “Reactions Weekly” Finasteride may cause weak ejaculation and reduced semen volume.
2 citations,
October 2017 in “Drug safety - case reports” Finasteride for hair loss may cause painless bleeding in urine and semen.
February 2024 in “The Journal of Sexual Medicine” 5-α reductase inhibitors do not significantly affect male reproductive function but may reduce semen volume.
45 citations,
November 2021 in “Fertility and Sterility” The conclusion is that women under 35 should start fertility checks after 12 months of trying to conceive, women over 35 after 6 months, and women over 40 should start immediately. The checks should include ovulation status, reproductive tract structure, and male partner's semen evaluation.
125 citations,
January 1999 in “Drugs” Finasteride effectively treats baldness but may cause sexual side effects.
47 citations,
January 2021 in “Fertility and Sterility” COVID-19 might affect male fertility, but more research is needed to understand the full impact.
38 citations,
December 2010 in “Fertility and Sterility” Finasteride may cause male infertility, stopping it can help.
18 citations,
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,
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,
May 2021 in “Journal of Assisted Reproduction and Genetics” COVID-19 may harm male fertility and damage the reproductive system.
15 citations,
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,
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,
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,
March 2010 in “International Journal of Andrology” Finasteride 1-mg doesn't harm sperm or pregnancy chances.
8 citations,
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,
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.
2 citations,
January 2011 in “Yearbook of Urology” Stopping finasteride can improve sperm count in infertile men.
1 citations,
September 2021 in “Fertility and Sterility” American men seeking infertility evaluation are generally older, more obese, have longer infertility duration, and different lifestyle habits compared to Canadian men.