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 Kohlschütter reading room in Halle. In 1880 he founded a holiday camp at Güntersberge in the Harz Mountains for needy, financially disadvantaged children. In 1892 he was appointed councillor ("Gemeinderat") in Halle. He died in 1905 at Bad Salzschlirf. The thoroughfare "Kohlschütterstraße" in Halle is named in his honor. Ernst Kohlschütter Ernst Otto Heinrich Kohlschütter (26 December 1837 – 7 September 1905) was a German physician born in Dresden. He was the father of astronomer Arnold Kohlschütter (1883–1969). The son of Dr. Otto Kohlschütter (1807–1853), he studied medicine at the University of Leipzig. In 1862 he earned his doctorate with an