Fetal Growth Scan with Umbilical Artery Doppler (24 weeks)
Fetal growth scans can be performed at any stage after 24 weeks of pregnancy. This scan is for women who are concerned about their pregnancy for any reason. A growing baby is a healthy baby so sometimes they are performed in a sequence to enable a true picture of any potential problems.
Although midwives and doctors feel and measure the maternal abdomen during pregnancy these are not particularly good methods for detecting small or large babies. Ultrasound allows a more accurate estimation of a baby’s size, and also a comprehensive assessment of fetal health and wellbeing.
We also check the umbilical artery Doppler, baby’s movements, and the volume of amniotic fluid. If there is a concern about baby’s growth or health, we will perform a full biophysical assessment of your baby including (if necessary) full fetal arterial and venous Doppler blood flow measurements.
During this scan we measure the baby's head, abdomen and limbs, and estimate the baby’s weight. This gives a guide to how big your baby will be at birth. We also look at how the baby is moving, the amount of amniotic fluid, and where the placenta is.
It is possible to tell the sex of your baby from this scan, but this becomes more difficult as you approach the end of your pregnancy.
What are the indications or reasons for having this scan?
- As a second opinion
- More detailed scan
- As reassurance
- Reduced movement of the baby
- Bleeding or fluid loss
- To check to baby's position
- If the placenta was low at the 20 week scan
- An abnormality was seen
- If the baby was measuring too small or big at the 20 week scan
- If on examination the tummy measures too small or too big
- Previous premature delivery
- Previous pre-eclampsia
- Diabetes or Gestational diabetes
All scans at Cambridge Fetal Care are performed by experienced Fetal Medicine Consultants. Therefore all questions, concerns and scan findings can be discussed at the time of your appointment.
How to prepare for your scan
No preparation is required prior to this scan. However, on occasion the baby may be in a particularly difficult position and we may ask that you walk about for 15 minutes or so, or fill or empty your bladder to enable us to obtain the very best views.
We are very happy to give photographs at the time of the scan; there is no charge for this but the quality of the picture may depend on the baby taking up a photogenic position!
After the scan, we will give you a follow up form. We should be very grateful, as part of our audit and quality control, if you would return this after your pregnancy.