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Doctor insights on: First Trimester Nuchal Translucency Screening

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What is nuchal translucency screening?

What is nuchal translucency screening?

Nuchal Translucency : Nuchal Translucency is a screening test to determine risk of chromosome abnormalities in a fetus. When the NT is greater than 3.5 mm, there is a 1 in 5 chance of a chromosome abnormality such as Turner or Down syndrome, or Trisomy 18. Additional tests should be ordered by an OB or genetic counselor for confirmation. A mother may decide to continue or end of the pregnancy based on the information. ...Read more

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Dr. John Landi
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Screening (Definition)

Examples are: colonoscopy for colon polyp or cancer; mammograms for breast lesions or cancer; psa a blood test that could indicate enlargement of cancerous prostate tissue; blood sugar or hemoglobin a!c for diabetes. Many think that scanning the whole body will pick up a cancer--in all likelihood, it will not. There also is no good blood test, yet, ...Read more


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Nuchal translucency screening, what is this?

Nuchal translucency screening, what is this?

Nuchal Translucency : Nuchal Translucency is a screening test to determine risk of chromosome abnormalities in a fetus. When the NT is greater than 3.5 mm, there is a 1 in 5 chance of a chromosome abnormality such as Turner or Down syndrome, or Trisomy 18. Additional tests should be ordered by an OB or genetic counselor for confirmation. A mother may decide to continue or end of the pregnancy based on the information. ...Read more

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What is first trimester screening and maternal fetal medicine?

What is first trimester screening and maternal fetal medicine?

Ob terms: 1st trimester screening are any tests done during a pregnancy during the first 12-14 weeks of pregnancy. This can include ultrasounds. blood tests and others. Maternal fetal medicine is a subspecialty of obstetrics. It's also often called "perinatology". These are obstetricians who go on to do additional training in the management of high risk pregnancies. ...Read more

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How accurate are 1st trimester ultrasounds in estimating gestational age? What about 2nd trimester ultrasounds?

How accurate are 1st trimester ultrasounds in estimating gestational age? What about 2nd trimester ultrasounds?

Accurate!: 1st trimester ultrasounds are very accurate - have correlated with timed ivf pregnancies. We usually consider 1st trimester scans accurate within 5-7days' 2nd trimester scans within 10-14days. ...Read more

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How accurate are first trimester ultrasounds done abdominal?

How accurate are first trimester ultrasounds done abdominal?

Diagnostics: This question is hard to answer because it depends upon what you're looking for with your first trimester ultrasound. If you're trying to figure out how far along you are in the pregnancy that is excellent, if you're trying to figure out if your baby has down syndrome it's not perfect and will require further work up with other blood tests and ultrasounds. ...Read more

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How accurate are first trimester ultrasoubds?

How accurate are first trimester ultrasoubds?

Very accurate: Ultrasounds tend to get more inaccurate as your pregnancy progresses. First trimester ultrasounds are more accurate than second trimester ultrasounds, which are in turn more accurate than third trimester ultrasounds. First trimester ultrasounds can reliably predict gestational age within 5-7 days. ...Read more

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Are first trimester ultrasounds better at estimating conception or lmp?

Are first trimester ultrasounds better at estimating conception or lmp?

Better than later: A pregnancy dating ultrasound done at 8 to 11 weeks of pregnancy is pretty accurate when done by an experienced technician. The estimate can be a few days or a week off in either direction. ...Read more

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Nuchal translucency screen, how is this used?

Nuchal translucency screen, how is this used?

Nuchal Translucency : Nuchal Translucency is a screening test to determine risk of chromosome abnormalities in a fetus. When the NT is greater than 3.5 mm, there is a 1 in 5 chance of a chromosome abnormality such as Turner or Down syndrome, or Trisomy 18. Additional tests should be ordered by an OB or genetic counselor for confirmation. A mother may decide to continue or end of the pregnancy based on the information. ...Read more

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Is it possible that the nuchal translucency (ips) ultrasound be performed at 8-9 weeks?

Is it possible that the nuchal translucency (ips) ultrasound be performed at 8-9 weeks?

Nuchal translucency: The nuchal translucency test is standardized to 11 -13 6/7 weeks. The crown rump measurement of the fetus must be 45 - 84 mm. ...Read more

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Is transvaginal ultrasound accurate in detecting early pregnancy?

Is transvaginal ultrasound accurate in detecting early pregnancy?

Yes: At 5-6 weeks a gestational sac and pregnancy reaction can be seen. At about 7 weeks a tiny fetal pole and heartbeat can be seen. At less than 5 weeks, nothing may be seen so would need to check blood and urine results before planning for sono. ...Read more

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Will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?

Will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?

Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it from view. ...Read more

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What is the due date accuracy w/ 1st trimester ultrasound?

What is the due date accuracy w/ 1st trimester ultrasound?

It depends: It depends on what was measured and when. Very early, the sac diameter is accurate to ±5 to 7 days. Later, a measurement called the 'Crown-Rump-Length' at 7 to 10 weeks of gestation is the accurate to ±3 days. After 10 weeks, the accuracy of the CRL falls slightly with a margin of error of ±5 days at 10 to 14 weeks. ...Read more

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How is conception date calculated by first trimester ultrasound?

How is conception date calculated by first trimester ultrasound?

Measurements: US uses measurements of the gestational sac and then the growing fetus to date a pregnancy. The appearance of the heart beat. Usually measurements are compared to standards for various parts of the pregnancy and a date assigned. ...Read more

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What changes a due date? And why is the first trimester ultrasound more accurate than the second trimester ultrasound?

What changes a due date? And why is the first trimester ultrasound more accurate than the second trimester ultrasound?

Ultrasound dating.: First trimester ultrasound is by far the most accurate in determining the precise due date (+/- 3-7 days, depending on exactly when it is performed). Second trimester sonograms are less accurate but still helpful in pegging down the due date within +/-7-12 days. Third trimester scans are not very accurate in dating the pregnancy, as growth varies (+/- 14-21 days). Menstrual dating is not very good. ...Read more

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Are first trimester ultrasounds ever exact in dating?

Are first trimester ultrasounds ever exact in dating?

Early Ultrasounds: Actually they are thought to be the most accurate. ...Read more

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Age 21 first pregnancy. Vanishing twin lost at 7 weeks. Nuchal translucency scan this week, so nervous! What are the chances that its high risk?

Age 21 first pregnancy. Vanishing twin lost at 7 weeks. 
Nuchal translucency scan this week, so nervous! What are the chances that its high risk?

Don't worry: It sounds like you are getting good care. Try not to worry as it is not good for you nor your pregnancy. Just wait and see what the tests show. Try to enjoy your pregnancy, and do what you can to stay healthy. Drink plenty of water, eat a healthy diet containing lots of fresh fruits and vegetables, walk 45 minutes every day, and take Prenatal vitamins containing Folic acid. ...Read more

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Is early satiety normal during first trimester of pregnancy?

Is early satiety normal during first trimester of pregnancy?

Not usually: Early satiety is seen in late term pregnancy however the nausea of early pregnancy could potentially be expressed as early full feeling! I would speak with your OB-GYN about this symptom ESPECIALLY if you are LOOSING weight! Hope this helps! Dr Z ...Read more