L.A. KOZLOV, N.V. YAKOVLEV Kazan State Medical University, Kazan Contact: Kozlov L.A. ― MD, Professor of the Department of Obstetrics and Gynecology named after Prof. V.S. Gruzdev Address: 49 Butlerov Str., Kazan, Russian Federation, 420012, tel. +7-906-115-16-56, e-mail: klev1930@yandex.ru At the verge of the 19th and 20th centuries, in the world and Russian science it […]