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) 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 Institute until 1948. He obtained his doctorate in medicine in 1895 and served as a military physician at the Prussian Institute of Infectious Diseases in Berlin from 1902. He was promoted to captain in 1903. From 1904 to 1907 he worked at the Royal Institute for Experimental Therapy in Frankfurt. He was appointed as a Professor in 1906 and became a battalion physician and director of the