Antibodies stop sperm in their tracks (IMAGE) University of North Carolina at Chapel Hill Caption A scanning electron micrograph of human sperm stuck together and immobilized by an antisperm antibody. Credit University of North Carolina Chapel Hill/ B. Shrestha Usage Restrictions none License Original 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.