The placenta covers the cervix. This scan is better known as the 12 week scan (although it can be carried out anywhere between weeks 11 and 13). The placenta is the expected size and does not cover the cervix. 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). There is enough amniotic fluid in the uterus. This chapter describes normal structural development and the sonographic approach to 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 12 week scan is a routine ultrasound examination carried out at 10 to 14 weeks of gestation. 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. Imaging of the fetal face is possible in most ultrasound examinations beyond 12 weeks of gestation. Abnormal. This scan measures a tiny bit of fluid located behind the baby's neck, known as nuchal translucency. 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. The fetus is small or large for its age. The fetus is the right size for its age. Our 12 week scan showed that our baby had an 'underdeveloped nasal bone'. At 12 weeks pregnant, you will be offered an ultrasound scan. For comparison, the ultrasound image on the right shows an 11-week fetus with a normal nuchal translucency measurement. Normal. No birth defects can be seen. disproportional growth of abnormal features of the fetal face (Smith & Jones, 1988). Abnormal NT is also an indication for fetal echocardiography in the second trimester. We've got our 20 week ultrasound on the 30th December and I'm starting to worry. Table 2. During the examination, the fetus is seen by abdominal ultrasound. 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. Your 12-week scan can take place any time between 11 and 13 weeks. 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. 12 Week Nuchal Translucency Scan and Blood Test The 12-week pregnancy ultrasound scan, or nuchal scan, is the first routine scan of pregnancy. After that, the tissue gets thicker and is no longer translucent, so test results become inconclusive. I'm now in 19w1 day pregnant and have been trying to put this to the back of my mind. Abnormal NT is associated with a higher rate of structural abnormalities in fetuses with normal and abnormal karyotypes. This is the ultrasound typically completed at the 12 week mark of pregnancy. It’s amazing to think that at this point, your baby is fully formed. An NT is a special type of ultrasound using a very sensitive but safe machine. The findings of an ultrasound fall into two categories, normal and abnormal. 12 week scan abnormal. Occasionally the view is not clear and it may be necessary to perform a vaginal scan. 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. 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). How an NT screening is done.