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 He also influenced the Christian Konrad Sprengel who came to him for treatment. Sprengel took to botany thanks to Heim's suggestion that he needed to spend more time outdoors. The plant genus "Heimia" is named in his honor. Heim died on 15 September 1834 in his bed and Berliners escorted the carriage of his body to the cemetery at Halleschen gate in large numbers. A family grave is marked for his wife and him. 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