Normal Swimming Sperm (VIDEO) University of California - Davis This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption These are monkey sperm swimming through cervical mucus. DEFB126 and the negatively-charged sugars extending from it allow sperm to swim through mucus. Credit Ted Tollner, UC Davis Usage Restrictions May be used with acknowledgement of the source. 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.