CHRONIC TREATMENT WITH FINASTERIDE DAILY DOES NOT AFFECT SPERMATOGENESIS OR SEMEN PRODUCTION IN YOUNG MEN

October 2000 in “The Journal of Urology”

James W. Overstreet, Vivian L. Fuh, John Gould, Stuart S. Howards, Michael M. Lieber, Wayne J.G. Hellstrom, Sander S. Shapiro, Peter R. Carroll, RANDLE S. CORFMAN, Steven Petrou, Ronald W. Lewis, Phillip D Toth, T. Shown, Johnny B. Roy, Jonathan P. Jarow, Jaime Bonilla, Carol A. Jacobsen, Daniel I. C. Wang, Keith D. Kaufman

TLDR Finasteride doesn't harm male fertility or sperm quality, but may slightly reduce ejaculate volume.

A study found that chronic use of finasteride for hair loss treatment does not affect sperm production or semen quality in young men, indicating that it is safe to use without affecting fertility. The drug's effects on prostate volume and serum PSA were minimal and reversible upon discontinuation. However, there was a slight decrease in ejaculate volume. Overall, the study concluded that taking finasteride daily for a long time does not harm male fertility.

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