
Birth control pill for males? Scientists developing hormone–free contraceptive tablet, sperms production...,name is...
The contraceptive tablet, YCT-529, which does not contain any hormones, has already demonstrated positive results in animal testing, preventing 99 per cent of pregnancies when tested in mice. Although further testing is necessary, this promising success in early testing brings greater hope that the pill may soon be a safe and effective birth control option for men.
According to a Daily Mail report, the hormone-free contraceptive tablet YCT-529 works by blocking access to vitamin A within the testes, thus preventing sperm from being produced. Subsequently, it will not affect testosterone levels. Notably, a man's libido is unaffected while the pill is being taken.
As experts hope to have a male contraceptive pill available by the end of this decade, this is the only one being tested in humans right now. In the most recent trial, researchers recruited 16 men, then gave them different dosages over several days. 'Instead of testing how effective it was in humans – all of the men had undergone vasectomies – the aim was to discover if there were any side–effects,' reads the Daily Mail report.
Analysis indicated that participants did not have any significant changes in heart rate, hormonal function, inflammation, mood, or sexual function. The next stage for the researchers is to conduct larger trials to assess how effective the pill is at preventing sperm production in humans. Experts stated that the findings of this safety trial, published in Communications Medicine, represent an important first step to the pill becoming approved and available.
According to the results of the safety trial, published in the journal Communications Medicine, a total of 16 male volunteers were enrolled to receive single oral doses of 10, 30, 90 or 180 mg of YCT-529 in the fasted state. Volunteers also received 30 mg in the fed state to study the effect of food on the pharmacokinetics of YCT-529.
What were the results of the test? Well, as per the results published in the Journal Communications Medicine, single doses of up to 180 mg of YCT-529 had no effects on heart rate, hormone (follicle-stimulating hormone, luteinizing hormone, and testosterone), sex hormone-binding globulin or inflammatory biomarker levels, sexual desire or mood. Further, there was no clear food effect on the pharmacokinetics of YCT-529. The name of the study is Safety and pharmacokinetics of the non-hormonal male contraceptive YCT-529.

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Mint
26-07-2025
- Mint
Male contraceptive YCT-529 a breakthrough? Birth control pill that temporarily halts sperm without hormones clears trial
In a new development, men may soon be able to equitably share the responsibility of avoiding pregnancy along with their partners as YCT-529, a birth control experimental pill has passed its initial human safety test, making another way for contraception. It will reportedly cease sperms temporarily without hinderance to hormones. Unlike conventional hormonal birth control pills, the innovative pill developed by YourChoice Therapeutics temporarily halts sperm production while leaving testosterone levels unchanged, New York Post reported. It functions by inhibiting a protein named retinoic acid receptor alpha, which is essential in the sperm creation process. Initial studies indicate that its effects are completely reversible. In tests involving male mice, YCT-529 significantly decreased sperm production, leading to reversible infertility after only four weeks of treatment. When these treated males bred with females, the drug demonstrated a 99% success rate in preventing pregnancy. Comparable outcomes were observed in male nonhuman primates, with sperm counts declining within two weeks of beginning the treatment. Importantly, fertility was fully restored in both species once the drug was discontinued. Mice recovered within six weeks, while primates regained fertility between 10 and 15 weeks. No side effects were noted in either group throughout the studies, the report added. The initial human trial of the medication included 16 healthy males aged 32 to 59, all of whom had previously had vasectomies, a surgical operation that severs and blocks the tubes transporting sperm from the testicles to prevent conception. This additional safety measure was required because no nonhormonal male contraceptive had ever been evaluated in humans before. Scientists wanted to eliminate any chance of permanently impacting fertility, in case participants wished to have children later, Nadja Mannowetz, co-founder and chief science officer of YourChoice Therapeutics, informed Scientific American. She clarified the objective was not to assess effectiveness but to determine if the drug was tolerated well and to observe how it accumulated in the body. Researchers tested multiple doses and found no concerning side effects. There were no changes in heart rate, hormone levels, inflammation, sexual function, or mood. This finding is important because hormonal contraceptives have previously been linked to side effects like mood swings, decreased libido, weight gain, and acne. Mannowetz pointed out that across all doses, the drug demonstrated good and rapid bioavailability, which means it remained active in the body without breaking down too quickly, the report mentioned.


India Today
24-07-2025
- India Today
Male birth control pill shows promising results in first human trial
After decades of little progress in non-hormonal male contraception, scientists are now a step closer to a breakthrough. A new drug called YCT-529, taken as a pill, has shown promising results in a recent early-stage human drug works by blocking a protein involved in sperm production, specifically, by disrupting the action of retinoic acid, a form of vitamin A that plays a key role in the development of sperm in the testes. The results of the trial were published in the journal Communications drug YCT-529 is a non-hormonal oral pill developed in collaboration with Columbia University in New York and YourChoice Therapeutics, a biopharmaceutical company conducting clinical trials. Previously, the pill showed 99% efficacy previously in mice and male monkey experiments, in which fertility was regained within 6 weeks in mice and 10 to 15 weeks in other experimental male contraceptives, YCT-529 does not affect hormone levels, making it potentially safer and more appealing for long-term this first-ever human study, 16 healthy male volunteers were given single doses of the pill in varying strengths - 10, 30, 90, and 180 were monitored closely for side effects and changes in vital health indicators, including heart rate, mood, sexual desire, and hormone results were encouraging: no major side effects were reported and the drug did not affect testosterone or other reproductive hormone and libido remained unchanged, easing concerns about psychological or sexual side the highest dose of 180 mg was well also tested how the drug behaved when taken with food and found no major difference, meaning it could be taken with or without was a Phase 1a trial, which is designed to test the safety of a drug before moving on to larger studies that look at how effective it is at its intended purpose, in this case, reducing sperm count to prevent it's still early days, the success of YCT-529 in this trial is a hopeful sign for the future of non-hormonal male birth control—a field that hasn't seen much progress in the last 50 years.- Ends


Time of India
24-07-2025
- Time of India
First non-hormonal male birth control pill YCT-529 approved safe in human trials
The future of male contraception just got real. In a historic first, YCT-529, a hormone-free male birth control pill, has successfully passed its first human safety trial. Unlike traditional contraceptives that disrupt hormones and cause side effects, YCT-529 works by selectively blocking sperm production without touching testosterone levels. Tired of too many ads? go ad free now Backed by the and , this breakthrough could revolutionise birth control by offering men a safe, reversible, and side-effect-free option. Here's what the science says, how it works, and when you can expect this game-changing pill to hit the shelves. What is YCT-529? The world's first non-hormonal male contraceptive pill is a non-hormonal oral contraceptive for men, developed to specifically block sperm production without interfering with testosterone. It targets a protein called retinoic acid receptor alpha (RAR-α), which plays a key role in vitamin A signaling necessary for sperm development. This approach avoids common side effects like mood swings, libido loss, or weight gain typically linked to hormonal contraceptives. Human trial confirms safety: Phase 1a study results In the first conducted in the UK, 16 healthy men were given single and multiple doses of YCT-529. Researchers tested its absorption with and without food. Key findings: No serious side effects Well-tolerated by all participants Reached desired levels in the bloodstream Did not affect testosterone or libido What's next? Upcoming trials and what they'll test YCT-529 has now entered a Phase 1b/2a trial with around 50 participants. This will: Measure how effectively it suppresses sperm counts Track long-term safety and daily dosing Last 28 days, with a longer 90-day trial planned for 2025 How YCT-529 is different from hormonal male contraceptives Most male birth control pills tested so far have targeted testosterone, which comes with a range of drawbacks: Hormonal Pills YCT-529 Alters testosterone Keeps hormones stable Mood swings, libido loss No mood or sexual side effects Weight gain, acne No physical or mental health changes Why this is a game-changer for men and society Currently, the burden of contraception is largely on women, with men having only two options: condoms or vasectomy. YCT-529 offers a third, game-changing choice that is: Reversible Non-invasive Side-effect free Orally taken Backed by the NIH and Male Contraceptive Initiative, this pill could drastically change how couples plan pregnancies, finally putting within reach. When will it be available? Trial Phase Timeline Phase 1a (safety) Completed 2024 Phase 1b/2a (efficacy) 2025 (ongoing) 90-day mid-stage trial Late 2025 Phase 3 & approval Likely by 2027–30 The final release will depend on long-term safety, effectiveness, and regulatory approval. But all early signs point toward success. The success of YCT-529 proves that safe, hormone-free male contraception isn't a far-off dream, it's here and moving fast. With more trials underway and strong scientific backing, this pill has the potential to balance reproductive responsibility between genders for the first time in history. If all goes well, you might just see it on pharmacy shelves by the end of the decade. Also read|