Please click here if you are not redirected within a few seconds. Home Pregnancy Health Antenatal scans.
The first trimester screening is a safe, optional test for all pregnant women. It's a way of checking your baby's risk of certain birth defects , such as Down syndrome , Edward's syndrome trisomy 18 , trisomy 13 and many other chromosomal abnormalities as well as heart problems.
Since chromosomal abnormalities can result in impaired cardiovascular development, a nuchal translucency scan is used as a screening, rather than diagnostic, tool for conditions such as Down syndrome , and non-chromosomal abnormalities, including the genetic Di George syndrome and non-genetic Body-stalk anomaly. There are two distinct measurements — the nuchal translucency, which is measured earlier in pregnancy at the end of the first trimester, and for which there is a lower threshold for increased diameter, and the nuchal fold, which is measured towards the end of the second trimester.
A balance must always be maintained between diagnostic benefit and risk to the patient. Normal thickness depends on the crown-rump length CRL of the fetus.
While it is true that most babies born to younger women have normal chromosomes, there is still always a chance of a chromosomal problem. The gestational age of your baby.
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