nuchal translucency ultrasound at how many weeks
The NT test uses ultrasound to measure the clear (translucent) space in the tissue at the back of your developing babyâs neck. The NT scan must be done when youâre between 11 and 14 weeks pregnant. The last day you can have it done is the day you turn 13 weeks and 6 days pregnant. Itâs usually offered along with a blood test in whatâs known as first-trimester combined screening.