Abdominal scans are performed once the baby is large enough for abdominal scans to produce clear images. For instance, the Nuchal Translucency Scan, performed at 12 to 14 weeks, is an external scan.

What can I expect at my 12 week scan?

It involves a blood test and measuring the fluid at the back of the babys neck (nuchal translucency) with an ultrasound scan. This is sometimes called a nuchal translucency scan. The nuchal translucency measurement can be taken during the dating scan.