How accurate are early ultrasounds in dating pregnancy Teach sexy chat ful adult
For example, this test will not tell us "no, the baby definitely does not have trisomy 13, 18 or 21" and, this test will not tell us “yes, your baby definitely has trisomy 13, 18 or 21”.To get a definitive 100% answer for chromosome abnormalities including Down syndrome, a prenatal diagnostic test is needed (chorionic villus sampling or amniocentesis).
Occasionally a transvaginal ultrasound is also needed.
The thickness of this fluid can be precisely measured and this is called the nuchal translucency (or NT) measurement.
Normally the amount of fluid is small, producing a thin NT measurement.
An increased NT measurement does not always mean the baby has a problem but it does increase the risk.
There are established and strict criteria for the accurate measurement of the nuchal translucency.
This test gives us an indication of whether we should worry about your baby based on these results.