What is a normal nuchal translucency measurement at 12 weeks?

An NT of less than 3.5mm is considered normal when your baby measures between 45mm (1.8in) and 84mm (3.3in) . Up to 14 weeks, your baby’s NT measurement usually increases as they grow. But after this, extra fluid can be reabsorbed.

What is a good nuchal translucency measurement?

Increased NT: (C) prone and (D) supine. The optimal time measure in the NT is between 11 and 13 6/7 weeks, at a corresponding CRL of 45–84 mm (131). The NT should be measured in the sagittal plane at its maximal thickness. The NT measurement may be expressed in multiple ways.

Is 1mm nuchal translucency normal?

For a baby that is between 45 mm and 84 mm in size, an NT of less than 3.5mm is considered normal. An NT less than 1.3 mm is considered to be low-chance and an NT of 6 is considered high chance for Down’s syndrome and other potential chromosomal abnormalities.

Is 0.9 mm nuchal translucency normal?

The average NT thickness was 1.7 mm (range from 0.9 mm to 13.4 mm). The NT was above the 95th centile of the normal range for the CRL in 75% (15 out of 20) of trisomy 21 pregnancies and in 64% (16 out of 25) pregnancies with other chromosomal abnormalities.

Is NT 0.9 mm normal?

How many mm is normal nuchal translucency?

A baby with an NT of 1.3mm is within the normal range. The baby with an NT of 2.9mm is also within the limit of normal range. Anything less than 3.5mm is considered within the normal range, meaning the likelihood of Down syndrome is low .

What does a risk factor of 1 100 mean?

For example, the likelihood of Down syndrome of one in 100 means that if 100, we expect that one of these women will have a baby with Down syndrome and that 99 will not. This is the same as saying that the baby has a 1 percent chance of having Down syndrome and a 99 percent chance that it does not.

How do I read NT scan report?

An NT scan is a common screening test that occurs during the first trimester of pregnancy. This test measures the size of the clear tissue, called the nuchal translucency, at the back of your baby’s neck. It’s not unusual for a fetus to have fluid or clear space at the back of their neck.