Hormonal or thermal male contraception is a complex subject, and its development takes time to result in a widely available solution.

noli's read

Scientific analysis confirms that the development of male contraception faces real biological and clinical challenges. Research into hormonal methods (aiming to reduce sperm production via testosterone or progestogens) shows high efficacy, documented in several randomized controlled trials (RCTs), but they often encounter side effects (mood, acne, weight variations) that complicate their regulatory approval. Thermal methods, such as heated underwear, rely on observational evidence suggesting a reduction in spermatogenesis through increased testicular temperature, but still lack large-scale, standardized phase III studies to confirm their long-term safety. The process is also slowed by very strict safety requirements for treatments intended for healthy individuals. It is therefore not a matter of a lack of will, but rather a difficult balance to strike between contraceptive efficacy, full reversibility, and tolerance of adverse effects. The time required reflects the rigor of the scientific process in ensuring the safety of the proposed methods.

the sources

No named source held this one up — that absence is part of the verdict.