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,
Richard Otto (physician) of the scientific council of the Army Medical Service from 1942. From 1938 to 1948 he was the director of the Institute for Experimental Therapy, which was renamed the Paul Ehrlich Institute during his tenure. In the postwar era he was one of the editors of the textbook series "Grenzgebiete der Medizin". He retired from his office as director of the Paul Ehrlich Institute in August 1948. Richard Otto (physician) Richard Ernst Wilhelm Otto (born 9 November 1872 in Zimmerhausen, died 12 August 1952 in Frankfurt) was a German physician and bacteriologist, who served as director of the Paul Ehrlich