Accurate 10 week dating scan

Posted by / 13-May-2020 09:16

Most units offer a screening test for Down's syndrome and other conditions at the same time as the dating scan.

Screening for Down's syndrome involves a nuchal translucency (NT) scan plus a blood test. You can have the combined screening test from 11 weeks to 13 weeks plus six days, or when your baby's CRL is 45mm (1.8in) to 84mm (3.3in).

Ultrasound scans are considered to be safe for you and your baby when performed by trained professionals.

However, sometimes, having a scan can cause unnecessary worry.

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The dating scan will also show if you're expecting twins, triplets, or more.

Therefore, from 13 weeks, or if your baby is longer than 84mm, the circumference of the head becomes the best way to measure your baby. Evaluation of gestation emedicine.[Accessed July 2017] Newson L.

Your baby's head, limbs, hands, and feet can be seen, as well as his abdominal wall and some organs, such as his stomach.

The dating scan isn't designed to look for more subtle abnormalities, though.

If you prefer, you can have a private screening test.

As well as the combined test, most private healthcare clinics offer non-invasive prenatal testing (NIPT), which is the most accurate (up to 99 per cent) screening test for Down's Syndrome.

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A blood test at what you thought was 13 weeks wouldn't be helpful if you were actually 16 weeks pregnant.