O.V. Trokhanova - Dr.Sc. (Med.), Professor, Department of Obstetrics and Gynecology, Yaroslavl State Medical University. E-mail: trokhanova@yandex.ru M.V. Hitrov - Dr.Sc. (Med.), Professor, Department of Obstetrics and Gynecology, Yaroslavl State Medical University M.D. Bryantcev - Ph.D. (Med.), Department of Obstetrics and Gynecology, Yaroslavl State Medical University Yu.A. Chijova - Assistant, Department of Obstetrics and Gynecology, Yaroslavl State Medical University T.S. Tuykin - Ph.D. (Phys.-Math.), Research Scientist, Kotelnikov`s Institute of Radio-Engineering and Electronics of RAS A.V. Korjenevsky - Dr.Sc. (Phys.-Math.), Professor, Leading Research Scientist, Kotelnikov`s Institute of Radio-Engineering and Electronics of RAS