A female asked:
i am 13 weeks pregnant and went for an nuchal translucency, which came out at 2.2mm in thickness which the doctor said is thicker than normal?
1 doctor answer • 4 doctors weighed in
Radiology 21 years experience
Not that simple: Nt scan is one of many screening tests used to assess for risk of a major chromosomal abnormality. There is a range of "normal" that has been established by scanning thousands of pregnancies. As with any screening test, a cutoff is chosen somewhat arbitrarily based on statistics. Most studies use a cutoff of 2.5 or 3.0 for "abnormal." NT is combined with blood tests to determine overall risk.
5.3k viewsReviewed >2 years ago
A 28-year-old female asked:
Is 2mm a normal nuchal translucency at 13 weeks pregnant?
1 doctor answer • 2 doctors weighed in
Radiology 26 years experience
See below: The short answer is yes, it is within normal. However, it is a bit more complicated than that. The NT is one factor in assessing the risk of having a chromosomal abnormality. If you are 22 years old with an NT of 2 mm, you would get a different risk than a 45 yr old with an NT of 2 mm. There are other factors as well and the data is combined with blood work.
4.8k viewsReviewed >2 years ago
Last updated Jul 15, 2018
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