G.V. KAMENSKIKH1, V.A. NOVIKOVA2, A.S. OLENEV2 1Kuban State Medical University, 4 Sedin Str., Krasnodar, Russian Federation, 4350063 2Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklay Str., Moscow, Russian Federation, 117198  Kamenskikh G.V. — postgraduate student of the Department of Obstetrics, Gynecology and Perinatology, Faculty of Advanced Studies and Professional Retraining of Specialists, tel. (861) 222-01-14, […]