Chen Chen, Michigan State University (IMAGE) Michigan State University Caption Chen Chen, at Michigan State University, and a team of scientists turned off the gene that controls sperm production, effectively silencing spermatogenesis in mice. Credit Photo by Derrick Turner Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.