[A male contraceptive injection can be available within 5 years]
Related Experiment Video
Updated: Oct 18, 2026

Mouse Round Spermatid Injection
Published on: January 26, 2024
1Karolinska institutet och Karolinska sjukhuset.
Abstract:
After more than two decades of attempts to develop a safe male contraceptive, the goal now seems attainable. Spermatogenesis, which is dependent on endogenous testosterone production in the testes, may be controlled by such exogenous steroid hormones as testosterone, gestagens, or combinations of them. The recent development of gonadotrophin-releasing hormone (GnRH) antagonists has provided an added means of depressing testosterone production. Other targets for interference with male fertility are the germinal epithelium (e.g. using the cottonseed oil product, Gossypol, or Triptyrigeum Wilfordii extract), or the maturing sperm in the epididymis (using immunoactive substances).
Related Concept Videos
Birth Control Methods
Intrauterine Drug Delivery Systems
Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacokinetics
Instead, they are transported by the blood to different tissues. Muscles with a greater blood supply (arteries) and blood flow receive more...
Parenteral Drug Delivery Systems: Injectables, Implants, and Infusion Devices
Infertility in Males
Drug Delivery: Parenteral Route
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...

