An NT is a special type of ultrasound using a very sensitive but safe machine. A sonographer will apply a transducer (wand) to the outside of your stomach to measure your baby from crown to rump and check that the fetal age is accurate. Then he or she will locate the nuchal fold and measure its thickness on the screen.

How is NT scan done during pregnancy?

How does an NT scan work? During the screening, your doctor or a technician will take an abdominal ultrasound. You could alternatively have a transvaginal test, where an ultrasound probe is inserted through your vagina. An ultrasound uses high frequency sound waves to create an image from inside your body.

What is the difference in pregnancy between girl and boy?

Three weeks into pregnancy, women carrying girls exhibited hormone levels 18.5 percent higher than those of their boy-carrying counterparts, regardless of factors such as previous pregnancies or maternal age. Finding this gender-related difference so early in pregnancy may help explain how it occurs.