B. L. Tsivyan
Mechnikov North-Western State Medical University; City Hospital No. 40 of Kurortnyi District
Russian Federation

Boris L. Tsivyan — Dr. Sci. (Med.), Prof., Chair of Obstetrics and Gynaecology named after S.N. Davydov; Head of the Gynaecology Unit

Kirochnaya str., 41, St. Petersburg, 191015

Borisova str., 9, lit. Б, Sestroretsk, St. Petersburg, 197706

S. V. Vardanyan
Mechnikov North-Western State Medical University; City Hospital No. 40 of Kurortnyi District
Russian Federation

Samvel V. Vardanyan — Cand. Sci. (Med.), Research Assistant, Chair of Obstetrics and Gynaecology named after S.N. Davydov; Physician (obstetrics and gynaecology), Gynaecology Unit

Kirochnaya str., 41, St. Petersburg, 191015

Borisova str., 9, lit. Б, Sestroretsk, St. Petersburg, 197706

K. V. Mekoshvili
City Hospital No. 40 of Kurortnyi District
Russian Federation

Kristina V. Mekoshvili — Cand. Sci. (Med.), Physician (obstetrics and gynaecology), Gynaecology Unit

Borisova str., 9, lit. Б, Sestroretsk, St. Petersburg, 197706

S. B. Onegova
Mechnikov North-Western State Medical University
Russian Federation

Svetlana B. Onegova — Physician (obstetrics and gynaecology), Gynaecology Unit 

Kirochnaya str., 41, St. Petersburg, 191015

A. E. Chernobrovkina
Granov Russian Research Centre for Radiology and Surgical Technologies
Russian Federation

Alla E. Chernobrovkina — Physician (obstetrics and gynaecology), Research Assistant, Chair of Radiology, Surgery and Oncology

Leningradskaya str., 70, Pesochnyi stlmt., St. Petersburg, 197758