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 Burchard Ernst Burchard Ernst Burchard (September 9, 1876 – February 5, 1920) was a German physician, sexologist, and gay rights advocate and author. Burchard, who was gay, testified as an expert witness in several court cases involving prosecutions on grounds of Paragraph 175, which criminalized homosexual practices. Burchard was born in Heilsberg (modern Lidzbark Warmiński, Warmian-Masurian Voivodeship). He studied medicine in Tübingen, Würzburg and Kiel, taking his doctoral degree in 1900 with a dissertation on "Einige Fälle von vorübergehender Glycosurie". After his studies, he worked as a physician in Berlin and opened his own practice. Here he met Dr. Magnus Hirschfeld