Hydrogels Slow Down Stem Cells (IMAGE) American Chemical Society Caption Using a hydrogel that mimics the mucus around embryos in diapause, researchers are able to prevent stem cells and human embryos from differentiating. Credit Richard Weightman and Irene Canton 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.