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According to a recent USA Today article, researchers at Weill Cornell Medicine have tested a non-hormonal drug on mice that can make them temporarily infertile. The best part? It lasts for only a matter of hours, with minimal side effects and no irreversible damage. The new drug targets a protein called soluble adenylyl cyclase (sAC), which stops the protein from waking up the sperm, so they remain dormant after ejaculation and cannot swim up to the uterus.