The uterine arteries are the maternal vessels supplying the uterus with blood. The pressure/resistance in these vessels is associated with the blood supply to, and function of, the placenta. Most people with “raised Dopplers” (high pulsatility index; PI) have a normal pregnancy. However, compared with people with a lower uterine artery PI, there is a higher likelihood of hypertension in pregnancy (including pre-eclampsia), fetal growth restriction, and the need for early/preterm birth. Overall, the risk of stillbirth remains small, but somewhat higher than for other pregnancies. Planned birth (e.g. induction of labour) is recommended by around 41 weeks where the uterine atery PI is moderately raised, to reduce the risk of stillbirth with ongoing pregnancy.