In 2012, Rita Csapo-Sweet and her husband, the late Frederick Sweet, jointly published a paper on the ghastly but little-known legacy of Carl Clauberg, a German physician who conducted mass sterilization experiments at Auschwitz during World War II. Clauberg would use his work in the concentration camp to develop a pioneering fertility test.
“Clauberg’s name needs to be placed next to [Josef] Mengele’s in its rightful place in infamy,” the two scholars concluded, emphasizing that Clauberg’s medical crimes against humanity “must be disclosed whenever the test bearing his name appears” in modern biomedical texts.
As Csapo-Sweet and Sweet dug into their research, filmmakers Sylvia Nagel and Sonya Winterberg also began a documentary about Clauberg — and the St. Louis-based couple’s academic article filled in key gaps in the filmmakers’ story. Nagel and Winterberg reached out to Csapo-Sweet in 2015, and she joined the documentary as its American producer.