One of the most exciting things about coming to the end of your first trimester is having your first ultrasound scan, during which you’ll see your baby for the very first time. Ultrasound scans don’t hurt, and they don’t cause any harm to your unborn baby.
The NHS offers two ultrasound scans during your pregnancy. The first is known as the dating scan or the 12-week scan, and it takes place between 11 and 14 weeks. At your dating scan, the sonographer will be able to provide a reasonable estimate of your due date based on your baby's measurements5.
If you’ve chosen to have a combined screening test for Down’s syndrome, Edwards’ syndrome, and Patau’s syndrome, your dating scan will include a nuchal translucency scan and a blood test. During the nuchal translucency scan, the sonographer will measure the fluid at the back of your baby’s neck. This nuchal translucency, along with your age and the blood test, will determine the chances of your baby having one of the above conditions5.
If you have any questions about the available screening tests and how they work, don't hesitate to discuss them with your midwife or doctor.