E.V. Kovalskaya - Embryologist, Department of Assistive Reproductive Technology in the Treatment of In-fertility Research Center of Obstetrics, Gynecology and Perinatology (Moscow) E-mail: e_kovalskaya@oparina4.ru A.G. Syrkasheva - Ph.D. (Med.), Research Scientist, ART Department, Research Center for Obstetrics, Gynecology and Perinatology (Moscow) E-mail: anast.syrkasheva@gmail.com A.Yu. Romanov - Clinical Resident, Research Center for Obstetrics, Gynecology and Perinatology (Moscow) E-mail: romanov1553@yandex.ru N.P. Makarova - Ph.D. (Med.), Senior Research Scientist, Department of Assistive Reproductive Technology in the Treatment of Infertility Research Center of Obstetrics, Gynecology and Perinatology (Moscow) E-mail: np_makarova@oparina4.ru N.V. Dolgushina - Dr.Sc. (Med.), Associate Professor, Head of R&D Department, Research Center for Obstetrics, Gynecology and Perinatology (Moscow) E-mail: n_dolgushina@oparina4.ru