Male Contraceptive Pill Blocks Sperm Movement
Weill Cornell Medicine researchers are developing a pill that temporarily stops sperm from moving, with human trials targeted within two years.
Updated on Nov. 5, 2026 in Men’s Health
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Weill Cornell Medicine researchers are developing a male contraceptive pill that temporarily stops sperm movement. Preliminary studies suggest the drug could affect sperm motility within about 30 minutes of being taken.
Why it matters
Options for men are currently limited, largely to condoms and vasectomy. A reversible pill that temporarily disables sperm movement could widen contraceptive choices if it proves safe in humans.
The predicted effect on sperm motility begins within about 30 minutes and may last six to eight hours, based on preliminary studies. Human timings and safety remain unestablished, as the drug has not yet been tested in people.
The players
Weill Cornell Medicine
A medical school and research institution in New York City affiliated with Cornell University, which is developing the male contraceptive pill.
The details
The pill is designed to temporarily inhibit the enzyme soluble adenylyl cyclase (sAC), which helps sperm swim and move through the female reproductive system. Researchers expect fertility to return to normal once the drug wears off and the enzyme resumes functioning, and the drug must first undergo additional safety testing in animals.
Timeline
Within about 30 minutes of taking the drug, sperm motility is potentially affected.
Effects on sperm motility potentially last six to eight hours after taking the drug.
Researchers hope to begin initial human trials within the next two years.
Big Picture
Weill Cornell Medicine's male contraceptive research represents one of the few active efforts to develop a non-surgical, hormone-free option for men, a field long dominated by condoms and vasectomy. The sAC-targeting pill extends that research program into a potential reversible alternative still years from human use.
If developed successfully, a reversible pill could give men a daily or as-needed contraceptive option beyond condoms and vasectomy. Its effects on daily health routines and access remain unknown until human safety data is available.
The takeaway
A male contraceptive pill would be a significant shift if proven safe, but it remains in early research with human safety unknown. Readers should watch for human trial announcements before drawing conclusions about availability.
What happens next
Researchers hope to begin initial human trials within the next two years, pending further safety testing in animals.
Further reading
Explore more on Men's Health for context on male contraceptive options and reproductive health research.
Source note: This article includes information reported by News18.
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