October 2020 in “Journal of Pakistan Association of Dermatology” Finasteride appears safe for long-term sperm concentration, but more research is needed for clear conclusions.
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.
38 citations
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December 2010 in “Fertility and Sterility” Finasteride may cause male infertility, stopping it can help.
34 citations
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January 2004 in “Revista do Hospital das Clínicas” Finasteride may worsen infertility in men with existing issues, but stopping it can improve sperm health.
33 citations
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April 2015 in “Current Opinion in Endocrinology, Diabetes and Obesity” 5α reductase inhibitors treat hair loss but may cause sexual side effects and risks.