Ernst Gräfenberg Ernst Gräfenberg Ernst Gräfenberg (September 26, 1881 in Adelebsen near Göttingen, Germany – 28 October 1957 in New York City, United States) was a German-born physician (medical doctor) and scientist. He is known for developing the intrauterine device (IUD), and for his studies of the role of the woman's urethra in orgasm. The G-spot is named after him. Gräfenberg studied medicine in Göttingen and Munich, earning his doctorate on 10 March 1905. He began working as a doctor of ophthalmology at the university of Würzburg, but then moved to the Department of Obstetrics and Gynaecology at the University of Kiel,
Ernst Gadermann After the war Gadermann worked as heart and circulatory specialist in Hamburg. There in 1947 he and Adolf Metzner developed the basics of the first telemetric measurements of the ECG in athletes. Gadermann was chief of the 1972 Summer Olympics sports medicine faculty. He died of a heart attack on 26 November 1973 in Hamburg on his way to a lecture. Ernst Gadermann Ernst Gadermann (born 25 December 1913 – died 26 November 1973) was a German physician in the Wehrmacht of Nazi Germany during World War II. He was a recipient of the Knight's Cross of the Iron Cross.