Us obstetric nuchal dating scan

01 Oct

the results of all three factors may indicate a higher risk.this is because blood tests for down syndrome are not very accurate if you are having more than one baby.1962, after about two years of work, joseph holmes, william wright, and ralph meyerdirk developed the first compound contact b-mode scanner.fda discourages its use for non-medical purposes such as fetal keepsake videos and photos, even though it is the same technology used in hospitals.In addition, the nuchal translucency, which is a small echo free space at the back of the fetal neck, is measured.All fetuses have a nuchal translucency, but the larger the nuchal translucency measurement the higher the chance that there is a problem with the baby (eg.

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among those fetuses whose nuchal translucency exceeds the normal values, there is a relatively high risk of significant abnormality.

a short cervix preterm is undesirable: at 24 weeks gestation a cervix length of less than 25 mm defines a risk group for preterm birth, further, the shorter the cervix the greater the risk.

doppler sonography can be used to evaluate the pulsations in the fetal heart and bloods vessels for signs of abnormalities.

The gender of the fetus can also usually be established during this scan.

Usually conducted from week 28 of pregnancy, the growth scan is used to check the baby’s growth by measuring its head, abdomen, and thigh bone.