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 Johannes Schenck von Grafenberg Johannes Schenck von Grafenberg (Latin: Ioannes Schenckius) (June 20, 1530 – November 12, 1598) was a German physician. He studied at Tübingen, and was later a physician to the city of Freiburg im Breisgau. He was the father of physician Johann-Georg Schenck von Grafenberg (died 1620). Johannes Schenck was one of the more influential authorities on medicine during the late Renaissance Era. His studies of language disturbances caused by brain injuries are considered advanced by 16th century standards, and because of this research he is considered to be a pioneer of neurolinguistics. In this field he