How an NT screening is done. I'm now in 19w1 day pregnant and have been trying to put this to the back of my mind. Normal. It’s amazing to think that at this point, your baby is fully formed. No birth defects can be seen. For comparison, the ultrasound image on the right shows an 11-week fetus with a normal nuchal translucency measurement. Occasionally the view is not clear and it may be necessary to perform a vaginal scan. That is, the sonographer showed us a picture of the nasal bone and said it should be thicker than the skin covering it, but it wasn't. An NT is a special type of ultrasound using a very sensitive but safe machine. Our 12 week scan showed that our baby had an 'underdeveloped nasal bone'. Of the 12 cases of heart defect in the study population, four (33.3%) were detected at the 12–13‐week scan, five (41.7%) at the 20‐week scan and three (25.0%) after birth. 12 week scan abnormal. This scan is better known as the 12 week scan (although it can be carried out anywhere between weeks 11 and 13). disproportional growth of abnormal features of the fetal face (Smith & Jones, 1988). The fetus is small or large for its age. Abnormal NT is associated with a higher rate of structural abnormalities in fetuses with normal and abnormal karyotypes. There is enough amniotic fluid in the uterus. Abnormal. Table 2. At 12 weeks pregnant, you will be offered an ultrasound scan. First trimester screening is a prenatal test that offers early information about a baby's risk of certain chromosomal conditions, specifically, Down syndrome (trisomy 21) and extra sequences of chromosome 18 (trisomy 18). Your 12-week scan can take place any time between 11 and 13 weeks. The fetus is the right size for its age. Imaging of the fetal face is possible in most ultrasound examinations beyond 12 weeks of gestation. The 12 week scan is a routine ultrasound examination carried out at 10 to 14 weeks of gestation. After that, the tissue gets thicker and is no longer translucent, so test results become inconclusive. 12 Week Nuchal Translucency Scan and Blood Test The 12-week pregnancy ultrasound scan, or nuchal scan, is the first routine scan of pregnancy. The placenta covers the cervix. This is the ultrasound typically completed at the 12 week mark of pregnancy. During the examination, the fetus is seen by abdominal ultrasound. You can have this pregnancy scan in London in our private clinic as a one-off or as the start of an ongoing relationship where we will offer diagnosis and support throughout your pregnancy. Abnormal NT at 11-14 weeks is an indication for genetic counseling, and early second trimester ultrasound at 14-16 weeks should be considered. The placenta is the expected size and does not cover the cervix. 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. The findings of an ultrasound fall into two categories, normal and abnormal. We've got our 20 week ultrasound on the 30th December and I'm starting to worry. It is a special ultrasound scan which is performed to specifically measure a tiny bit of fluid that lies under the baby's skin behind the neck known as the nuchal translucency (NT). Discussion in 'Gestational Complications' started by ... Doc told me it isn't looking good and our baby has one or the other based on the ultrasound results. Abnormal NT is also an indication for fetal echocardiography in the second trimester. This chapter describes normal structural development and the sonographic approach to This scan measures a tiny bit of fluid located behind the baby's neck, known as nuchal translucency.