When to do a pregnancy dating scan

An ultrasound scan that helps the NHS confirm how many weeks pregnant you are, checks how your baby is developing - and gives you an amazing black and white photo to take home Your week ultrasound scan is the 1st of the 2 routine pregnancy scans you're offered on the NHS.

It's officially known as the 'dating scan' because it's used to pinpoint your baby's due date. It's also a bit of a moment. That's because it's likely to be the 1st time you 'see' your baby whee! So in love, it's unreal!

WHEN TO DO A DATING SCAN

They will also check that anatomically everything is where should be. Then you get your amazing pictures and you can tell the world! Dating scans are offered at some point between 8 and 14 weeks, with most of them happening between 11 and 14 weeks. If you've had fertility treatment, have a history of miscarriages or are in pain or bleeding during the first weeks of pregnancy, you may be offered an early scan before this routine dating scan.

Ask a midwife: When should I get a dating scan?

But, assuming your pregnancy is healthy, you'll still have the dating scan at round about the week mark. The scan is done externally by rolling a device over your tummy unless your womb is very deep in your pelvis or you're very overweight, when it may be thought better to offer you a trans-vaginal scan instead.

You'll be asked to arrive with a full bladder. The scan itself will take about 15 to 30 minutes but you may need to hang about for a while in the waiting room beforehand — which can be tricky when you've just drunk all that water! But don't be tempted to skip the water drinking for that reason. It's best to wear trousers or a skirt and a top, rather than a dress, as once you're in the dimly lit room, you'll be asked to lie on your back on a couch and adjust your clothes to expose your bump.

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:.

Select search...

The screening test for Down's syndrome used at this stage of pregnancy is called the "combined test". It 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.

week pregnancy dating scan - NHS

Find out more about the combined screening test for Down's syndrome. You won't be offered the combined screening test if your dating scan happens after 14 weeks. Instead, you will be offered another blood test between 14 and 20 weeks of pregnancy to screen for the risk of Down's syndrome.

Popular in Competitions

If screening tests show a lower risk, most parents choose not to put themselves, or their unborn baby through further, more invasive tests. What do I need to know?

Non-Invasive Prenatal Testing Nuchal Translucency Scan Pregnancy ultrasound scans Rhesus disease and Anti-D injections Testing and screening for chromosome abnormalities X-rays can affect your pregnancy What is a third trimester pregnancy growth scan? What you need to know about a cervical length pregnancy scan 12 week pregnancy dating scan: Deciphering maternity note abbreviations. Your maternity notes make for interesting reading.