The position of the chief SS doctor of the garrison (Standortarzt) in Auschwitz made it possible for Eduard Wirths to regularly investigate the activity of the physicians conducting medical experiments in Auschwitz. Moreover, Wirths became involved in individual projects on his own initiative. The first was testing on the inmates the medications delivered by pharmaceutical companies to the camp.
Since the spring of 1943 he conducted experiments together with his brother, Helmut Wirths, a gynaecologist who studied the development of cervical cancer. The two selected the inmates for experimentation from among the Jewish women in Block No. 10 in the mother camp. If they were suspected of that form of cancer, or it was identified during the examination, they amputated the cervix and sent the thus obtained material to the histological laboratory in Hamburg, where Helmut Wirths worked. In some cases, photographs were also taken in the camp’s photographic studio. After the completion of the experiment, the inmates were sent to Birkenau camp without being informed about the condition of their health.