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OP37.03: Sensitivity of the lower, mean and higher uterine artery first trimester Doppler pulsatility index in screening for pre‐eclampsia

by the fourth reading. There was no significant difference in MAP readings between the groups with five repeated BP readings versus that in which the BP was measured at the end of the scan. Conclusions: Maternal pulse readings indicate that women are least anxious during their scans. The maternal MAP stabilises in > 90% of cases by the fifth reading during the scan. Measuring the BP at the end of the scan is the most accurate and cost-effective way of assessing MAP in early pregnancy.