What is a normal NT measurement at 13 weeks?

During the routine first trimester screening at 13 weeks of gestation, NT was measured at 3 mm. The normal range of NT for this age is 1.6-2.4 mm.

What is a high risk nuchal result?

The calculation based on the mother’s age, the nuchal translucency measurement of your baby, the gestational age of the baby, blood tests and the baby’s nasal bone. If you have a risk of 1 in 300 or greater (e.g. 1 in 150) you are considered to be in the “increased risk” category.

What is a normal nuchal measurement at 12 weeks?

At 12 weeks of gestational age, an “average” nuchal thickness of 2.18mm has been observed; however, up to 13% of chromosomally normal fetuses present with a nuchal translucency of greater than 2.5mm.

What kind of blood test is the nuchal translucency test?

The screening involves two steps. A blood test checks for levels of two substances — pregnancy-associated plasma protein-A (PAPP-A) and human chorionic gonadotropin. A special ultrasound, called a nuchal translucency screening, measures the back of the baby’s neck.

What do you need to know about the nuchal test?

Share on Facebook. Tweet on Twitter. The nuchal translucency test is also known as nuchal fold scan or NT and it is a prenatal test that is meant to inform your doctor about the chances for the baby to be affected by Down’s syndrome or some other kinds of chromosomal abnormalities or congenital heart problems.

How is the nuchal screening in the first trimester?

The first trimester screen won’t harm you or your baby. A technician will take a quick blood sample from your arm or fingertip. The nuchal translucency screening is a normal ultrasound. You’ll lie on your back while a technician holds a probe against your belly. It will take between 20 to 40 minutes. You should have the results in a few days.

How is the nuchal area measured in Down syndrome?

Ultrasound Part – In this baby’s skin layer around the back of the neck (nuchal area) is measured via ultrasound. In Down syndrome, because of lymphatic drainage problem, the skin layer thickness is more than normal babies. So higher skinfold thickness can be found in downs syndrome.