This scan aims to determine the growth and wellbeing of the fetus by:
- Measurement of the size of the fetal head, abdomen and thigh bone and calculation of an estimate of fetal weight
- Examination of the movements of the fetus
- Evaluation of the placental position and appearance
- Measurement of the amount of amniotic fluid
- Assessment of blood flow to the placenta and fetus by colour Doppler ultrasound
- Every well-being scan is an anomaly scan as 25% of fetal anomalies may be detected first in the 3rd trimester.