[Umbilical blood flow indices in smoking women].

A collective of 154 pregnant women, who smoked at least 5 cigarettes a day was examined by doppler ultrasound. Measurements were taken at the two ends of the umbilical cord. The results had been compared to the physiological constellation of the resistance indices. Elevation of the PI was mainly to be registrated at the fetal abdominal insertion of the umbilical vessels. It seems to be dependent on the duration and amount of smoking. There was no correlation to be found to the fetal outcome.