Doppler ultrasound. A key pregnancy scan, recommended for all pregnant women, especially in the third trimester (>28 weeks’ gestation), to ensure that your baby is growing at a healthy rate. This examination (also known as the well-being or growth scan) can identify fetal growth restriction, detect the risk of premature birth and preeclampsia, and determine if your baby is receiving enough oxygen and nutrients. It is also conducted to ensure that there are no complications (reduced growth measurements, low fluid levels, or placental concerns) and the baby is in a favorable head-down position for birth.

When can I have the Doppler scan?

The Doppler scan can be done anytime from 26 weeks up until the end of pregnancy. It is typically performed between the 32nd and 34th week, only by fetal medicine specialists.

The Doppler scan typically takes 30 minutes. Its duration depends on:

  • The number of fetuses
  • The mother’s BMI (Body Mass Index)
  • The baby is in a favorable head-down position for birth

A balanced meal is recommended before the scheduled appointment, in order to achieve good fetus mobility. 3D/4D imaging is available as long as the fetal position and the expectant mother’s BMI are appropriate.

What does the Doppler scan check for?

During this detailed scan, we check:

  • Fetal growth
  • Fetal anatomy
  • Fetal activity
  • Fetal oxygenation: Through Doppler studies that assess to blood flow in fetal vessels (umbilical and middle cerebral arteries and fetal ductus venosus) and maternal vessels (uterine arteries)
  • Position of placenta
  • Amount of amniotic fluid.

Why should I have a Doppler scan?

This scan is performed to confirm that:

  • Your baby is growing healthy
  • There are no signs of complications (e.g. reduced growth, low fluid levels, or placental concerns)
  • The baby is in a favorable head-down position for birth