Can you see nuchal fold at 9 weeks?
The nuchal translucency scan is best done during the 12th week, but it can be done from 11 weeks and 3 days up until 14 weeks and your local NHS hospital will offer you an appointment to have this done at around this time.
Can a thick nuchal fold be normal?
The nuchal fold is a normal fold of skin at the back of a baby’s neck. This can be measured between 15 to 22 weeks in pregnancy as part of a routine prenatal ultrasound. Follow-up is offered when the nuchal fold is thick (6 mm or more). Many healthy babies have thick nuchal folds.
What is a normal nuchal translucency measurement at 9 weeks?
RESULTS: The median nuchal translucency thickness was 1.8 mm at 9 weeks’ gestation and it declined to 1.6 mm at 10 weeks. But the median thickness increased from 1.95 mm at 11 weeks to 2.3 mm at 12 weeks, after which it slightly declined to 2.25 mm at 13 weeks. And then it increased to 2.5 mm at 14 weeks.
Does thick nuchal fold mean Down syndrome?
Many studies have shown that a thickened nuchal fold in a second-trimester fetus is a sonographic sign suggestive of a high risk for Down syndrome. These series have included fetuses already at risk for aneuploidy because of advanced maternal age or abnormal maternal serum alpha-fetoprotein (AFP) levels.
Can you see nuchal fold at 10 weeks?
NT screening is usually done between weeks 11 1/2 and 13 1/2, but it must be performed between week 10 and week 13 of pregnancy. After that, the tissue gets thicker and is no longer translucent, so test results become inconclusive.
How common is a thick nuchal fold?
Of the 10,416 singleton pregnancies in the study period, 149 fetuses had an increased nuchal fold thickness (1.4%).
How common is thick nuchal fold?
What is a normal nuchal translucency measurement at 10 weeks?
Results: The median nuchal translucency measurement increased from 0.7 mm at 10 weeks’ gestation to 1.5 mm at 13 weeks. A nuchal translucency measurement greater than 2.5 mm was found in 4.6% of the fetuses at 10 weeks’ gestation; the incidence increased to 8.7% at 14 weeks.
What does a thick nuchal fold indicate?
Definition. The nuchal translucency test measures the nuchal fold thickness. This is an area of tissue at the back of an unborn baby’s neck. Measuring this thickness helps assess the risk for Down syndrome and other genetic problems in the baby.
Can a baby with normal nuchal fold have Down syndrome?
When there is extra fluid and the NT measurement is thicker than normal, there is an association with chromosomal anomalies such as Down syndrome and some structural abnormalities in the fetus. Not all babies with an increased NT measurement have Down syndrome or any structural abnormality.
Who is at high risk for having a baby with Down syndrome?
Women who are 35 years or older when they become pregnant are more likely to have a pregnancy affected by Down syndrome than women who become pregnant at a younger age. However, the majority of babies with Down syndrome are born to mothers less than 35 years old, because there are many more births among younger women.
Can the nuchal fold decrease?
Conclusion: In fetuses with abnormal karyotype, the second nuchal translucency measurement tends to be increased or unchanged, while in normal cases the size of nuchal translucency is generally reduced.
How accurate is nuchal fold test?
How accurate is nuchal translucency? NT results by themselves have an accuracy rate of about 70 percent. That means that the test misses 30 percent of babies with Down syndrome or other chromosome disorders.