A.V. GANEYEVA¹, R.I. GABIDULLINA², S.D. MAYANSKAYA² ¹Kazan (Volga) Federal University, 2 Vishnevskiy Str., Kazan, Russian Federation, 420059 ²Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012  Ganeeva A.V. — obstetrician-gynecologist, tel. +7-917-253-15-78, e-mail: a.v.ganeeva@gmail.com Gabidullina R.I. — D. Med. Sc., Professor of the Department of Obstetrics and Gynecology No. 2, tel. +7-917-289-93-10, e-mail: […]