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 Grawitz (hematologist) Ernst Grawitz (hematologist) Ernst Grawitz (18 March 1860, Mittelhagen, Kreis Greifenberg – 11 July 1911) was a German internist remembered for his work in the field of hematology. He was a younger brother of pathologist Paul Grawitz (1850-1932). He studied medicine in Berlin, earning his degree in 1882. Following graduation, he served as a military physician, subsequently working as a prosector at the Augusta Hospital ("Auguste-Viktoria-Klinikum") in Berlin (1886-1889). Afterwards, he was an assistant at the Berlin-Charité. In 1890 he was habilitated for internal medicine, becoming an associate professor in 1897 as well as chief physician at the city hospital