How accurate are 12 week dating scans
Some 40% of Down syndrome fetuses will appear normal on the 20-22 week scan.Sometimes, there may be some ultrasound findings which can make us suspicious of an increase chance that the fetus has a chromosome lesion.
Hence, chromosomal lesions such as Down syndrome, cannot be diagnosed with ultrasound.
The best centres in the world consistently report on the limitations of ultrasound and its inability to detect all fetal abnormalities.
Up to half the fetal heart defects will not be seen.
Please note that this is a free option and is not the primary purpose of these scans.
If you’re looking to make your scan a family occasion, our reassurance and bonding type appointments are great for this.