Longitudinal Section (IMAGE) Parsemus Foundation Caption Histological examination (400X magnification) of contraceptive gel at wall of vas deferens. Upper left area (M) indicates the muscularis (muscle layer of the vas deferens wall). Arrowheads depict the mucosal epithelium (edge of the vas deferens wall). White stripe indicates small gap between gel and duct wall. Lower right area indicates vas deferens lumen (L) containing Vasalgel. Scattered trapped spermatozoa are present (arrows). Credit Christopher Premanandan, the Ohio State University 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.