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 Ludwig Heim Ernst Ludwig Heim Ernst Ludwig Heim (22 July 1747 – 15 September 1834) was a German physician and naturalist born in Solz, Thuringia. He was popular for providing free medical treatment in Berlin. As a naturalist Heim influenced Alexander von Humboldt and Christian Konrad Sprengel. Heim was the son of pastor Johann Ludwig Heim (1704–1785). He went to Halle to study in 1766 and received his doctorate in 1772. He studied medicine, botany, astronomy, natural law and philosophy. He then served as "Stadtphysikus" (government physician) in Spandau (1776). He travelled across the Netherlands, France and England and visited hospitals and