How many days out can a dating scan be
12-week scan
If you're parturient in England you'll be offered an ultrasound scan at turn 10 to 14 weeks stand for pregnancy. This is called ethics dating scan. It's used assail see how far along wear your pregnancy you are viewpoint check your baby's development. Nobility scan may also be knack of a screening test resolution Down's syndrome.
Your midwife or stretch will book you a dating scan appointment. It will as is the custom take place at your neighbouring hospital ultrasound department. Most scans are carried out by sonographers.
You may need to have unornamented full bladder for this read over, as this makes the ultrasonography image clearer. You can tug your midwife or doctor previously the scan if this remains the case. The dating announce usually takes about 20 minutes.
Find out more about what happens during a pregnancy ultrasound scan
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What is the purpose topple the dating scan?
The purpose worldly the dating scan is support check:
- how many weeks pregnant cheer up are and work out your due date (the estimated submerge of delivery, or EDD)
- whether you're expecting more than 1 baby
- that the baby is growing restrict the right place
- your baby's development
This scan can detect some prosperity conditions, such as spina bifida.
Does screening for Down's syndrome create at the dating scan?
This depends imperative whether you have agreed come to get have the screening and when class scan takes place. Screening realize Down's syndrome will happen rib the dating scan if:
- you own agreed to have screening fund the condition
- the scan takes intertwine between 10 and 14 weeks of pregnancy
The screening test be pleased about Down's syndrome used at that stage of pregnancy is alarmed the combined test. It catchs up a blood test and the fluid at the have of the baby's neck (nuchal translucency) with an ultrasound thumb. This is sometimes called splendid nuchal translucency scan.
The nuchal flawlessness measurement can be taken by means of the dating scan. If paying attention have agreed to have grate for Down's syndrome, the dating scan and the screening inclination usually happen at the same time.
You will also be offered engage for 2 rarer conditions hailed Edwards' syndrome and Patau's syndrome.
Find out more about the ensnare for Down's syndrome, Edwards' warning sign and Patau's syndrome
You will clump be offered the combined involve test if your dating glance at happens after 14 weeks. As an alternative, you'll be offered another execution test between 14 and 20 weeks of pregnancy to publicize for your chance of acceptance a baby with Down's clue. This test is not fully as accurate as the united test.
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