Nuchal Translucency Ultrasound
About Nuchal Translucency Ultrasounds
A nuchal translucency (NT) ultrasound is performed between weeks 11 and 13 of pregnancy. Between 9 and 12 weeks gestation, your baby undergoes a process called organogenesis or the process of organ formation. As such, the purpose of this ultrasound is to assess the baby’s development up to this point. This test includes measuring the clear tissue, called the nuchal translucency, at the back of your baby's neck. This measurement helps assess the risk of associated chromosomal abnormalities as well as major congenital heart defects. It is not a definitive test. If an abnormal result is detected during the exam, further testing will be recommended. There is optional bloodwork called eFTS (Enhanced First Trimester Screening), offered to patients at this time as well. eFTS is covered through OHIP. More information about eFTS can be found on Ontario’s Prenatal Screening website by clicking here.
All women have a small chance of delivering a baby with a physical or cognitive disability. While a nuchal translucency exam is optional for all pregnant people, it is recommended in the following scenarios:
- Age 35 or older
- Family history of chromosomal disorders
- Previous pregnancy with a chromosomal disorder
- Abnormal blood test results
Markham Fertility Centre continues to care for its patients through the first trimester. Your fertility doctor will talk to you about whether a nuchal ultrasound is recommended in your instance. The test can be done at CARE Imaging, located on the same floor as the clinic. CARE Imaging allots one (1) hour for this ultrasound. It can be completed much sooner, but the exam length depends on baby’s position, movement, and technical factors.
Steps to Prepare for a Nuchal Translucency Ultrasound
ALLERGY ALERT : Notify the sonographer if you have a latex allergy.
Investigative and Pre-Treatment Ultrasounds
Sonohysterogram
A diagnostic exam to evaluate the shape of the uterus and determine whether the fallopian tubes are open or closed.
Pelvic Baseline Ultrasound with Antral Follicle Count (AFC)
A 3D ultrasound to assess the uterus and ovaries for anomalies and to check ovarian reserve.
Ultrasounds that Occur During Treatment
Follicle Tracking Ultrasound
A vaginal ultrasound performed during an IUI, IVF or Egg Freezing cycle to assess the number and growth of your follicles. This test helps the doctor know when your ovaries are ready.
Ultrasound Guided Embryo Transfer
An ultrasound performed at the time an embryo is transferred into the uterus to help the doctor find the perfect spot.
Pregnancy Ultrasounds
Early Obstetric Ultrasound
An abdominal ultrasound that is done to confirm pregnancy, usually between week 5 and 7 of pregnancy, repeated as necessary.
Nuchal Translucency Ultrasound
An ultrasound performed in the first trimester of pregnancy to determine your baby's risk of congenital conditions like Down syndrome.