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,
Johann Ernst Hebenstreit continens fossilia animalia, vegetabilia marina"". Carl Linnaeus named the plant genus "Hebenstreitia" in honor of Hebenstreit. Johann Ernst Hebenstreit Johann Ernst Hebenstreit (15 January 1703 – 5 December 1757) was a German physician and naturalist born in Neustadt an der Orla. He was a student at the University of Leipzig, where in 1728 he earned his philosophy degree, and one year later obtaining his medical doctorate with the dissertation ""De viribus minerarum et Mineralium medicamentosis"". In 1731 he became a member of the German Academy of Sciences Leopoldina. In 1731 he was appointed by Augustus II to head an expedition