Colony Management (IMAGE) Parsemus Foundation Caption Vasectomy has been the only male option available to non-human primate veterinarians who wish to reduce the pregnancy rate in their colonies. The study published today chronicles the use of Vasalgel in groups of rhesus macaques - offering a new tool to colony managers. Credit Kathy West/ CNPRC 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.