“…A brief survey of the extensive literature and the results of animal experiments indicate almost unequivocally th at oestrogens seem to play a decisive role in the development of the histological changes in the anterior pituitary during pregnancy (Berblinger et al, 1923;Brouha, 1929;Lehman, 1927;Baniecki, 1928: Zondek et al, 1931Collip et al, 1933;Romeis, 1940;Ilohltveg, 1934;Wolfe et al, 1938;Schultze, 1955, etc. ).…”