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 Weinland Ernst Weinland Ernst Weinland (9 March 1869, Hohenwittlingen – 17 October 1932, Urach) was a German physiologist and parasitologist. He studied medicine at the universities of Munich, Tübingen, Berlin and Leipzig. He also studied zoology, and in the process earned a PhD at the University of Berlin. After finishing his medical studies at Leipzig, he worked as an assistant physician in Esslingen and as an assistant in the laboratory of Karl von Voit at the University of Munich. In 1899 he obtained his habilitation for physiology and afterwards became an associate professor at the technical school in Freising. From 1913