The pregnancy dating scan
Your health, your choices. Choose ecan right service. Work out your due date. Make your birth plan. Will my dating scan change my due date pregnant women are offered an ultrasound scan at around weeks of pregnancy. This scan is called the dating scan. It's used to see how far along in your pregnancy you are and check your baby's development. Your midwife or doctor will book you a dating scan appointment. It will usually take place at your local wil ultrasound department.
You may need to have a full bladder for this scan, as this makes the wlll image clearer. You can ask your midwife or doctor before the scan if this is cgange case. The scan usually dahing around 20 minutes. Find out more about what happens during a pregnancy ultrasound scan. Some abnormalities may also be detected at this scan, such as neural tube defects spina bifida is a type of neural tube defect.
Screening for Down's syndrome will happen at the dating scan if:. The screening test for Down's syndrome used at this stage of pregnancy is called the combined test. The combined test involves a blood test and measuring the fluid at the back of the baby's 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.
If you have agreed to have screening for Down's syndrome, the dating scan and the screening will usually happen at the same time. Find out more about the combined screening test for Down's syndrome. You will not be offered the combined screening test if your dating will my dating scan change my due date happens after 14 weeks. Instead, you will be offered another blood test will my dating scan change my due date 14 and 20 weeks of pregnancy to screen for the risk of Down's will my dating scan change my due date. This test datiny not quite as accurate as the combined test.
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