NHS Video:What happens at a scan and what will they tell me?
Understanding what you need to know about your pregnancy ultrasound scans
Ultrasound scans are given to pregnant women to build a picture of the baby in the womb.They use sound waves which are painless and have no known side effects on mothers or babies. Ultrasounds can be carried out at any stage of pregnancy but hospitals in England offer all pregnant women at least 2 ultrasound scans during their pregnancy and they are carried out at 8 to 14 weeks and between 18 and 21 weeks.
NHS midwives talk through what you can expect from an ultrasound scan in this video.
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