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,
Anton Ludwig Ernst Horn is also credited for providing an early description of tabes dorsalis. Anton Ludwig Ernst Horn Anton Ludwig Ernst Horn (August 24, 1774 – September 27, 1848) was a German physician who was a native of Braunschweig. In 1797 he received his doctorate from the University of Göttingen, and later worked as a physician at the clinical institute in Braunschweig. For a short period of time he was a professor of medicine at the Universities of Wittenberg (1804) and Erlangen (1805), and in 1806 went to work at the medical hospital at the Charité in Berlin. One of his well-known students