This particular period of gestation is the best time frame to visualize the baby’s structures and anatomy to provide information on the risk of birth defects or abnormalities.

During the 20 week scan heart abnormalities like holes larger than 5mm or any malformation in the arteries can be clearly seen.

• NT scan normal range must be less than 3.5 mm. If you get a normal NT Scan report, it means that your baby has low risks of having chromosomal abnormalities.

   

  However, the anomaly scan is highly accurate, yet it cannot detect 100% of structural abnormalities.

  While most babies are born healthy, only a small percentage of them stand the risk of developing complications.

  An anomaly scan cannot detect such complications that evolve during the later phases of gestation.

• No. NT scan is not 100% in detecting the baby’s risk of having chromosomal abnormalities. However, NT scan is usually combined with a test called double marker test. Both of these tests together are around 85% accurate.

• The double marker test is a blood test that is done along with the NT scan to detect any chromosomal abnormalities in the fetus. It measures the levels of PAPP-A (pregnancy-associated plasma protein A) and beta hCG hormones in the blood.

   
   

• The double marker is a mandatory test and may be recommended by your gynecologist.

  The NT scan gives information about the risk of chromosomal abnormalities in the fetus, whereas the double marker test provides extra information about your pregnancy.

• During the ultrasound scan,  we measure the thickness of the nuchal fold. Nuchal fold is the normal skin fold that is present in the back of the fetus’s neck. 

  If the nuchal thickness is less than 3.5 mm, it means that the baby has low risks of chromosomal abnormalities.

  But if the thickness is more than 3.5 mm, it means the results are abnormal and you would require further intervention

• Usually, the NT Scan report has details about the mother such as name, age, blood group and LMP (Last Menstrual Period). It also contains the baby’s measurements such as CRL (Crown-rump length) that indicates the length of the baby, BPD (biparietal diameter) – the diameter of the baby’s head; HC (head circumference); and AC, that refers to the Fetal abdominal circumference.

  The main section is the NT scan measurements which is usually measured in mm. If the measurement is below 3.5mm, it means the report is normal. Usually, it is mentioned in the report as normal.

  Incase of abnormal measurements, that is over 3.5mm, it would be mentioned as “increased nuchal translucency” in the report with the measurements in m