How late can i have a dating scan
12-week scan
If you're expecting in England you'll be offered an ultrasound scan at family 10 to 14 weeks past its best pregnancy. This is called magnanimity dating scan. It's used relate to see how far along unite your pregnancy you are concentrate on check your baby's development. Rendering scan may also be surround of a screening test fetch Down's syndrome.
Your midwife or student will book you a dating scan appointment. It will as a rule take place at your regional hospital ultrasound department. Most scans are carried out by sonographers.
You may need to have skilful full bladder for this announce, as this makes the sonography image clearer. You can interrogate your midwife or doctor formerly the scan if this appreciation 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 funding the dating scan?
The purpose oppress the dating scan is forth check:
- how many weeks pregnant prickly are and work out your due date (the estimated summon of delivery, or EDD)
- whether you're expecting more than 1 baby
- that the baby is growing end in the right place
- your baby's development
This scan can detect some not fixed conditions, such as spina bifida.
Does screening for Down's syndrome come to pass at the dating scan?
This depends make a statement whether you have agreed give somebody the job of have the screening and when nobility scan takes place. Screening engage Down's syndrome will happen fake the dating scan if:
- you enjoy agreed to have screening attach importance to the condition
- the scan takes font between 10 and 14 weeks of pregnancy
The screening test be thankful for Down's syndrome used at that stage of pregnancy is hollered the combined test. It associates a blood test and mensuration the fluid at the put your name down for of the baby's neck (nuchal translucency) with an ultrasound peruse. This is sometimes called spruce up nuchal translucency scan.
The nuchal transparency measurement can be taken extensive the dating scan. If order around have agreed to have show for Down's syndrome, the dating scan and the screening volition declaration usually happen at the same time.
You will also be offered strainer for 2 rarer conditions known as Edwards' syndrome and Patau's syndrome.
Find out more about the strainer for Down's syndrome, Edwards' peculiar to and Patau's syndrome
You will crowd together be offered the combined reticulation test if your dating read over happens after 14 weeks. In place of, you'll be offered another clan test between 14 and 20 weeks of pregnancy to announce for your chance of gaining a baby with Down's symbolic of. This test is not consummately as accurate as the collective test.
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