GRADIENTS OF MATERNAL AND FETAL BLOOD FLOW AT THREAT OF PREMATURE DELIVERY

Purpose: To search Doppler patterns at threat of premature delivery. Methods and Materials: Parameters of blood flow (S/D ratio) in umbilical, right and left maternal uterine arteries in 482 women with physiological pregnancy and in 326 women with complicated pregnancy were investigated in II-III trimesters. We estimated absolute values S/D ratio and gradients of blood flow between uterine arteries and between umbilical and uterine arteries. Results: In progress normal pregnancy gradual decrease of gradients of blood flow between right and left uterine arteries and between umbilical and uterine arteries was foun…