E.V. ULYANINA, N.R. AKHMADEEV Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012   Ulyanina E.V. ― postgraduate student of the Department of Obstetrics and Gynecology named after prof. V.S. Gruzdev, e-mail: [email protected], ORCID ID: 0000-0002-2256-0856 Akhmadeev N.R. ― Cand. Med. Sc., Assistant of the Department of Obstetrics and Gynecology named after prof. V.S. […]