M. I. Krivonos
Institute of Obstetrics Gynecology and Reproductive named after D.O. Ott
Russian Federation

graduate student, 

Mendeleevskaja linija, 3, Sankt-Peterburg, 199034

M. S. Zainulina
The first St. Petersburg State Medical University named after Academician Pavlov; St. Petersburg health care institution "Maternity Hospital №6 them. prof. VF Snegirev"
Russian Federation

MD, Professor of the Department of Obstetrics and Gynecology, ul. L'va Tolstogo, 6-8, Sankt-Peterburg, 197022;

chief physician, ul. Majakovskogo, 5, Sankt-Peterburg, 191014

S. A. Selkov
Institute of Obstetrics Gynecology and Reproductive named after D.O. Ott
Russian Federation

MD, Professor, Honored Worker of Science, Head of the department of immunology and cell-cell interactions,

Mendeleevskaja linija, 3, SanktPeterburg, 199034