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,
Johannes Schenck von Grafenberg published the 1584 treatise "Observationes medicae de capite humano", in which he describes his personal observations of language disorders, along with the observations of other physicians. Schenck's best-known written work was "Observationum medicarum rariorum, libri VII", which was a seven-volume compendium that described pathological conditions concerning all the parts of the human body. Information in these books was derived from medical experiences described by Schenck and his contemporaries, and well as medical observations taken from sources dating back to antiquity. Johannes Schenck von Grafenberg Johannes Schenck von Grafenberg (Latin: Ioannes Schenckius) (June 20, 1530 – November 12, 1598) was a