RESULTS OF FETAL ULTRASOUND IMAGING AND DOPPLER ULTRASOUND STUDY DEPENDING ON THE FACTORS OF PERINATAL RISK IN PRETERM BIRTH ArticleOrazmuradov A.A., Konnon S.R., Khubetsova M.T., Savenkova I.V., Minaeva A.V., Novginov D.S., Kretsu V.N., Lukaev A.A.International Journal of Biomedicine. Том 8. 2018. С. 42-46