M. S. Zainulina
I.P. Pavlov First Saint Petersburg State Medical University, Health Ministry of Russian Federation; V.F. Snegirev Maternity Hospital № 6
Russian Federation

Zainulina Marina Sabirovna – MD, Professor, Department of Obstetrics, Gynecology and Reproduction, I.P. Pavlov FSPbSMU HM  of RF. Physician-in-Chief, V.F. Snegirev Maternity Hospital № 6.

6/8, ul. L'va Tolstogo, Saint Petersburg, 197022; 5, ul. Mayakovskоgo, Saint Petersburg, 192014

D. R. Eremeeva
V.F. Snegirev Maternity Hospital № 6
Russian Federation

Eremeeva Dina Rustemovna – PhD, Obstetrician-gynecologist, Head of the 2nd Obstetric Department of Obstetrics and Pregnancy Complications.

5, ul. Mayakovskоgo, Saint Petersburg, 192014

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

Krivonos Marina Ivanovna – Рostgraduate student.

3, Mendeleevskaya liniya, Saint Petersburg, 199034