Advancing a "placenta-on-a-chip" (IMAGE) Iowa State University Caption Nicole Hashemi, right, an associate professor of mechanical engineering, and Justin Sehlin, a graduate student, work in the Hashemi Lab to develop a "placenta-on-a-chip." Credit Photo by Christopher Gannon/Iowa State University. 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.