How accurate is 12 week dating scan
Talk to your midwife, GP or obstetrician about any concerns you have.
For many women, ultrasound scans are the highlight of pregnancy.
The dating scan and anomaly scan are offered to all women, but you don't have to accept them.
Your choice will be respected if you decide not to have the scans, and your antenatal care will continue as normal.
It's very exciting to "see" your baby in the womb, often moving their hands and legs.
Having the scan does not hurt, but the sonographer may need to apply slight pressure on your tummy to get the best views of the baby. However, the sonographer may not be able to get good views if your baby is lying in an awkward position or moving around a lot.
Ultrasound scans use sound waves to build a picture of the baby in the womb.
The scans are painless, have no known side effects on mothers or babies, and can be carried out at any stage of pregnancy.
The sonographer will put ultrasound gel on your tummy and tuck tissue paper around your clothing to protect it from the gel.
The gel makes sure there is good contact between the machine and your skin. It is this probe that sends out ultrasound waves and picks them up when they bounce back.