On 25.08.2022 Prof. Spranger gave a lecture on "The enigma of ethics committees" for students of biochemistry and for NIFE staff. He brought in many illustrative examples from his own experience. Afterwards, this topic, which has become increasingly complex in recent years and therefore very burdensome for scientists, was discussed with great enthusiasm ("Top 10 of the "all-time classics"). The lecture was held as part of the event series "Development of Cell Therapeutics: Experimental Applications and Clinical Use of Adult Stem Cells", organized by Prof. Dr. Andrea Hoffmann. Prof. Spranger (Prof.Spranger) is a jurist, lawyer and head of a center for the regulation of modern life sciences. At the Rheinische Friedrich-Wilhelms University in Bonn, he teaches public law and the law of biotechnology, and at the University of Düsseldorf he teaches medical law. As a lawyer, he advises companies, regulatory authorities, research institutions and associations in particular on the evaluation of the latest technical developments.