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Are nhs dating scans accurate

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Back to Your pregnancy and baby guide. Ultrasound scans use sound waves to build a picture of the baby in the womb.

Your first pregnancy ultrasound scan...

The scans are painless, have no known side effects on mothers or babies, and can be carried out at any stage of pregnancy. Talk to your midwife, GP or obstetrician about any concerns you have. For many women, ultrasound scans are the highlight of pregnancy. It's very exciting to "see" your baby in the womb, often moving their hands and legs. Having a scan in pregnancy is usually a happy event, but be aware that ultrasound scans may detect some serious abnormalities, so try to be prepared for that information.

See What if a screening test shows a possible problem? Most scans are carried out by specially trained staff called sonographers. The scan is carried out in a dimly lit room so the sonographer is able to get good images Are nhs dating scans accurate your baby.

First you'll be asked to lie on a couch. You'll then be Are nhs dating scans accurate to lower your skirt or trousers to your hips and raise your top to your chest.

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. The sonographer passes a probe over your skin. A black and white picture of the baby will appear on the ultrasound screen. During the examination, sonographers need to keep the screen in a position that gives them a good view of the baby. The sonographer will carefully examine your baby's body.

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 Are nhs dating scans accurate get good views if your baby is lying in an awkward position or moving around a lot. If it's difficult to get a good image, the scan may take longer or have to be repeated at another time.

There are no known risks to the baby or the mother from having an ultrasound scan, but it is important that you consider carefully whether to have the scan or not.

This is because the scan can provide information that may mean you have to make further important decisions.

For example, you may be offered further tests, such as amniocentesis, that have a risk of miscarriage. Hospitals in England offer all pregnant women at least 2 ultrasound scans during their pregnancy:.

Find out about ultrasound baby...

The first scan is sometimes called the dating scan. The sonographer estimates when your baby is due the estimated date of delivery, or EDD based on the baby's measurements. The dating scan can "Are nhs dating scans accurate" a nuchal translucency NT scan, which is part of the combined screening test for Down's syndromeif you choose to have this screening.

This scan checks for structural abnormalities anomalies in the baby. Some women may be offered more than two scans, depending on their health and their pregnancy.

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