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.

Do you hear heartbeat at 12 week scan?

The sonographers will have the ultrasound screen angled so they can examine your baby carefully during the scan (NHS, 2017). But they might be able to turn the screen to show you the moving pictures. You and anyone else with you might be able to hear the heartbeat, as well as the whoosh of the blood flow to your baby.