Sperm Production in Mice (IMAGE) Cincinnati Children's Hospital Medical Center Caption This illustration shows the four stages of mouse spermatogenesis analyzed in research published Sept. 7, 2020, in Nature Structural & Molecular Biology. Credit Cincinnati Children's 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.