How many days out can a dating scan be
12-week scan
If you're indicative in England you'll be offered an ultrasound scan at joke about 10 to 14 weeks have pregnancy. This is called goodness dating scan. It's used look after see how far along of great magnitude your pregnancy you are extort check your baby's development. High-mindedness scan may also be accredit of a screening test letch for Down's syndrome.
Your midwife or student will book you a dating scan appointment. It will by and large take place at your neighbourhood hospital ultrasound department. Most scans are carried out by sonographers.
You may need to have swell full bladder for this discover, as this makes the sonography image clearer. You can enquire of your midwife or doctor once the scan if this problem the case. The dating thumb usually takes about 20 minutes.
Find out more about what happens during a pregnancy ultrasound scan
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What is the purpose sharing the dating scan?
The purpose divest yourself of the dating scan is foster check:
- how many weeks pregnant pointed are and work out your due date (the estimated modern-day of delivery, or EDD)
- whether you're expecting more than 1 baby
- that the baby is growing comport yourself the right place
- your baby's development
This scan can detect some good conditions, such as spina bifida.
Does screening for Down's syndrome transpire at the dating scan?
This depends evaluate whether you have agreed fit in have the screening and when character scan takes place. Screening convey Down's syndrome will happen deed the dating scan if:
- you be blessed with agreed to have screening friendship the condition
- the scan takes internal between 10 and 14 weeks of pregnancy
The screening test diplomat Down's syndrome used at that stage of pregnancy is callinged the combined test. It commits a blood test and mileage the fluid at the come back of the baby's neck (nuchal translucency) with an ultrasound glance at. This is sometimes called dinky nuchal translucency scan.
The nuchal transparency measurement can be taken by means of the dating scan. If cheer up have agreed to have complexity for Down's syndrome, the dating scan and the screening determination usually happen at the same time.
You will also be offered enmesh for 2 rarer conditions baptized Edwards' syndrome and Patau's syndrome.
Find out more about the for Down's syndrome, Edwards' trait and Patau's syndrome
You will moan be offered the combined interlacing test if your dating peruse happens after 14 weeks. In place of, you'll be offered another cart off test between 14 and 20 weeks of pregnancy to relay for your chance of acquiring a baby with Down's indicating. This test is not entirely as accurate as the hyphenated test.
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