ernst grÃ¤fenberg (september 26, 1881 in adelebsen near gÃ¶ttingen, germany â 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. ==career== grÃ¤fenberg studied medicine in gÃ¶ttingen and munich, earning his doctorate on 10 march 1905. he began working as a doctor of ophthalmology at the university of wÃ¼rzburg, but then moved to the department of obstetrics and gynaecology at the university of kiel, where he published papers on cancer metastasis (the "grÃ¤fenberg theory"), and the physiology of egg implantation. in 1910 grÃ¤fenberg worked as a gynaecologist in berlin, and by 1920 was quite successful, with an office on the kurfurstendamm. he was chief gynaecologist of a municipal hospital in britz, a working class berlin district, and was beginning scientific studies of the physiology of human reproduction at berlin university. during the first world war, he was a medical officer, and continued publishing papers, mostly on human female physiology. in 1929 he published his studies of the "grÃ¤fenberg ring", the first iud for which there are usage records.  17th-century, dutch physician regnier de graaf described female ejaculation and referred to an erogenous zone in the vagina that he linked with the male prostate; this zone was later reported by grÃ¤fenberg. jon e. roeckelein (2006). elsevier's dictionary of psychological theories. elsevier. p. 256. isbn 9780444517500. retrieved october 8, 2012. "the g-spot is not felt normally during a gynecological exam, because the area must be sexually stimulated in order for it to swell and be palpable; physicians, of course, do not sexually arouse their patients and, therefore, do not typically find the woman's g-spot." the term "g-spot" was coined by addiego et al. in 1981, named after grÃ¤fenberg, addiego, f; belzer, eg; comolli, j; moger, w; perry, jd; whipple, b. (1981). "female ejaculation: a case study.". journal of sex research 17 (1): 13â21. doi:10.1080/00224498109551094. even though grÃ¤fenberg's 1940s research was dedicated to urethral stimulation; in 1950, grÃ¤fenberg stated, "an erotic zone always could be demonstrated on the anterior wall of the vagina along the course of the urethra." ernest grÃ¤fenberg (1950). "the role of urethra in 
1881_births 1957_deaths American_people_of_German-Jewish_descent German_Jews_who_emigrated_to_the_United_States_to_escape_Nazism German_gynaecologists German_sexologists Jewish_American_scientists Ludwig_Maximilian_University_of_Munich_alumni People_from_the_Province_of_Hanover University_of_GAPttingen_alumni University_of_Kiel_faculty