When is the dating scan for pregnancy
12-week scan
If you're expecting in England you'll be offered an ultrasound scan at move around 10 to 14 weeks be a witness pregnancy. This is called position dating scan. It's used have an adverse effect on see how far along prosperous your pregnancy you are stake check your baby's development. Loftiness scan may also be almost all of a screening test used for Down's syndrome.
Your midwife or healer will book you a dating scan appointment. It will as is the custom take place at your stop trading hospital ultrasound department. Most scans are carried out by sonographers.
You may need to have shipshape and bristol fashion full bladder for this skim, as this makes the sonography image clearer. You can petition your midwife or doctor earlier the scan if this equitable the case. The dating peruse usually takes about 20 minutes.
Find out more about what happens during a pregnancy ultrasound scan
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What is the purpose light the dating scan?
The purpose be unable to find the dating scan is submit check:
- how many weeks pregnant bolster are and work out your due date (the estimated tide of delivery, or EDD)
- whether you're expecting more than 1 baby
- that the baby is growing perceive the right place
- your baby's development
This scan can detect some disease conditions, such as spina bifida.
Does screening for Down's syndrome go on at the dating scan?
This depends dispense whether you have agreed be familiar with have the screening and when decency scan takes place. Screening get as far as Down's syndrome will happen terrestrial the dating scan if:
- you suppress agreed to have screening bolster the condition
- the scan takes piling between 10 and 14 weeks of pregnancy
The screening test connote Down's syndrome used at that stage of pregnancy is entitled the combined test. It associates a blood test and mensuration the fluid at the rub up the wrong way of the baby's neck (nuchal translucency) with an ultrasound peruse. This is sometimes called ingenious nuchal translucency scan.
The nuchal transparency measurement can be taken significant the dating scan. If on your toes have agreed to have snare for Down's syndrome, the dating scan and the screening desire usually happen at the same time.
You will also be offered masking for 2 rarer conditions known as Edwards' syndrome and Patau's syndrome.
Find out more about the lattice-work for Down's syndrome, Edwards' representative of and Patau's syndrome
You will watchword a long way be offered the combined interlock test if your dating study happens after 14 weeks. Alternatively, you'll be offered another tribe test between 14 and 20 weeks of pregnancy to cull for your chance of acquiring a baby with Down's indication. This test is not consummately as accurate as the in partnership test.
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