Privacy Policy to make it clearer how we use your personal data. However, the team at the Georg lab emphasize that, as there are a variety of proteins involved in the formation of sperm, exploring other drug options would increase the likelihood of at least one contraceptive for people who produce sperm making it to the market. Screening through lead optimization of high affinity, allosteric cyclin-dependent kinase 2 (CDK2) inhibitors as male contraceptives that reduce sperm counts in mice