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.
January 2018 in “日本薬理学会年会要旨集 =”
March 2016 in “Dermatologica Sinica” Men with severe hair loss may have poorer sperm quality.
16 citations
,
January 2017 in “Asian journal of andrology/Asian Journal of Andrology” Men who start puberty later may have lower sperm quality and different hormone levels in adulthood.
68 citations
,
February 2019 in “Urology” Hormonal treatment in transgender women reduces semen quality, but stopping treatment may improve it.
October 2010 in “Journal of Men's Health” Larger prostate size in older men may be linked to poorer semen quality and fertility issues.
104 citations
,
October 2000 in “The Journal of Urology” Finasteride doesn't harm male fertility or sperm quality, but may slightly reduce ejaculate volume.
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.
1 citations
,
October 2023 in “Fertility and sterility” Men who went through puberty later had lower sperm counts and altered hormone levels, possibly affecting fertility.
15 citations
,
February 2013 in “International Urology and Nephrology” Low-dose finasteride may cause fertility issues, but stopping it can improve sperm quality and lead to pregnancy.
October 2017 in “Springer eBooks” A thorough initial check-up is essential before sperm banking to ensure the best chance of preserving good quality sperm.
47 citations
,
April 2021 in “Fertility and Sterility” COVID-19 might affect male fertility, but more research is needed to understand the full impact.
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.
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.
September 2008 in “UK vet. Companion animal” Castration is preferred for non-breeding male dogs with BPH, but other treatments are available with specific pros and cons.
54 citations
,
December 2013 in “Fertility and Sterility” Finasteride can reduce fertility in some men, but stopping it increases sperm count.
2 citations
,
October 2000 in “The Journal of Urology” Finasteride daily doesn't affect sperm production or semen in young men.
195 citations
,
May 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.
June 2022 in “Journal of Experimental Biology and Agricultural Sciences” Higher testosterone harms sperm motility, while higher estradiol improves sperm survival.
December 2023 in “Urogenital tract infection” Seminal bacteria can lower sperm quality in subfertile men.
June 2021 in “Archives of Advances in Biosciences” Finasteride reduces sperm count and quality and alters hormone levels in mice.
23 citations
,
July 2007 in “Archives of Andrology” Finasteride may negatively affect male fertility.
October 2010 in “Journal of Men's Health” Some patients may experience lasting sexual dysfunction, depression, and other side effects from 5α-reductase inhibitor therapy.
18 citations
,
April 2019 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.
8 citations
,
February 2017 in “Fertility and Sterility” Urologic diseases and treatments in older men can negatively affect fertility, and doctors should talk to patients about this.
54 citations
,
June 2018 in “International journal of risk & safety in medicine” Antidepressants, 5α-reductase inhibitors, and isotretinoin can cause long-lasting sexual dysfunction.
27 citations
,
October 2015 in “PharmaNutrition” Astaxanthin is a safe antioxidant that may improve heart, skin, eye health, and physical performance, and help manage chronic diseases.
104 citations
,
May 2019 in “F1000Research” Losing weight, fixing varicoceles, and using advanced sperm selection methods improve male infertility treatment outcomes.
January 2003 in “Humana Press eBooks” Dihydrotestosterone and 5α-Reductase play a role in hair loss and prostate health, and finasteride can increase hair growth in men without affecting sperm production, but it doesn't work for postmenopausal women with hair loss.
2 citations
,
December 2020 in “Frontiers in genetics” Researchers found genes linked to feather growth speed in Shouguang chickens, highlighting two genes that might explain differences in feathering.