Fibers and Sperm (image) University of Washington Share Print E-Mail Caption The electrospun fibers can release chemicals or, as shown here, they can physically block sperm. Credit Kim Woodrow, Univ. of Washington Usage Restrictions With credit Share Print E-Mail 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.