Désormeaux, in 1865, produced the first hystoscope.
Pantaleoni in 1869 accomplished the first hysteroscopy using the instrument of Désormeaux. He isolated and cauterized an uterine polyp with silver nitrate.
Nitze, in 1879, drew and produced an endoscope using the modern beginnings.
Hysteroscopy as described by S.Duplay and S.Clado, 1898 (this image is in the public domain).
Duplay and Clado, in 1898; David, in 1908; Heineberg, in 1914; Rubin, in 1925; Seymour, in 1926; Van Mikulicz, in 1927; Gauss, in 1928; Schroeder, in 1934; Segond, in 1937; Fourestier, Gladu and Vulmiere, in 1952; Mohri and Mohri, in 1954; Norment, in 1956; Palmer, in 1957; Silander, in 1962; Marleschki, in 1966; Edstrom and Fernstrom, in 1970; Lindemann and Mohr, in 1971; Porto and Gaujoux, in 1972; Vulmière, in 1972; Iglesias, in 1975; Lindemann, in 1976; Siegler and Kemman, in 1976; Hopkins, in 1976; March, in 1978 and Sugimoto, in1978-all of them contributed in some way to the technological progress of the method.
Hamou, in 1979, idealized the microhysteroscope with panoramic vision and of contact.