3D baby scans

Dating and Viability Scan

What information is gained from an early pregnancy scan?

Why might an ultrasound be required in the first 11 weeks of pregnancy?

How accurate is pregnancy dating?

A dating ultrasound of the length of the embryo when performed at 7-11 weeks gestation is accurate to within about 3 days. Beyond this time the accuracy reduces due to flexion (bending) of the fetus and individuals growth variance.