R.L. Gurbanova - Junior Research Scientist, Obstetrical and Gynecological Department, FSBI «Rostov research Institute of obstetrics and Pediatrics», Rostov-on-Don, Russia. E-mail: g_lr@mail.ru T.L. Botasheva - Dr. Sc. (Med.), Professor, Chief Research Scientist, Obstetrical and Gynecological Department, FSBI «Rostov research Institute of obstetrics and Pediatrics», Rostov-on-Don. E-mail: t_botasheva@mail.ru T.G. Kirillova - Ph.D (Biol.), Associate Professor, Federal Public Autonomous Educational Institution of Higher Education «Southern federal university», Rostov-on-Don, Russia. E-mail: tgkirillova@sfedu.ru N.F. Kolpakova - Ph. D (Biol.), Associate Professor, Federal Public Autonomous Educational Institution of Higher Education «Southern federal university» E-mail: nfkolpakova@sfedu.ru T.F. Zherdeva - Senior Lecturer, Federal Public Autonomous Educational Institution of Higher Education «Southern federal university». E-mail: tfzherdeva@sfedu.ru