New male pill aims to stop sperm production
NCT ID NCT03455075
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether a daily oral pill can safely and temporarily lower sperm counts in healthy men to prevent pregnancy. Ninety-two men took either the experimental drug (DMAU) alone, DMAU plus another hormone (LNG), or a placebo for 12 weeks. The goal was to see if sperm concentration could drop below 3 million per milliliter, a level considered effective for contraception.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center
Torrance, California, 90509, United States
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University of Washington Medical Center & Health Sciences
Seattle, Washington, 98195, United States
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